Grade 7 - Science and Technology THIRD QUARTER EXAMINATION
THIRD QUARTER Force, Motion and Energy Motion in One Dimension ►
1.
describes the motion of an object in terms of distance or displacement, speed or velocity and acceleration When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A. I and II only B. I and III only
C. II and III only D. I, II and III
The data below where obtained from a 40 0-meter dash competition. Female Athlete 1 2 3 4 2.
C. both I and II D. Neither I nor II
Which of the following graphs shows that the object’ s motion is accelerating? A
B
C
D
An object used as re ference point to determine the motion should be… A. stationary B. accelerating
5.
Recorded Time 23.5 22.8 24.0 23.8
The female athletes are faster than the male athletes. Compared to the speed of the fastest female athlete, the average speed of the fastest male athlete is slightly less. A. I only B. II only
4.
Male Athlete 1 2 3 4
Which of the following states is/are NOT tr ue? I. II.
3.
Recorded Time 27.5 27.1 26.2 27.8
C. changing direction D. decelerating
When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A. I and II only C. II and III only B. I and III only D. I, II and III
6.
When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A. I and II only B. I and III only
7.
C. II and III only D. I, II and III
How will you describe distance from displacement? I.
A girl walking on the foot-walk from canteen to library, while her friend walk across the canteen to library. II. A boy and a girl walk slowly in the foot walk from canteen to library. A. I only B. III only 8.
C. I and III D. none of these
When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A. I and II only B. I and III only
9.
What is the speed of the tortoise if it took 5 hours t o travel a distance off 3 km? A. 1.2km/h B. 0.6km/h
10.
C. II and III only D. I, II and III
C. 2.5km/h D. 0.8km/h
Which of the following is true about the object that travels 7 meters to the left, then 3 meters up, then another 7 meters to the right? A. The displacement if the of the object is equal to 17 meters. mete rs. B. The total distance travelled of the object is equal to 17 meters. C. The displacement of the object is equal to 17meters. D. The total distance travelled by the o bject is equal to 17 meters me ters down.
11.
Which statement about the movement of an object with zero acceleration is true? A. the object must be at rest B. the object must be slowing down C. the object maybe speeding D. the object may be stopping
12.
When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A. I and II only B. I and III only
13.
C. II and III only D. I, II and III
Which of the following is true about the object that travels 10 meters west, then 4 meters North, then another 10 meters to the East? A. The displacement if the of the object is equal to 24 meters. mete rs. B. The total distance travelled of the object is equal to 24 meters. C. The displacement of the object is equal to 24 meters. D. The total distance travelled by the obje ct is equal to 24 met ers down.
6.
When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A. I and II only B. I and III only
7.
C. II and III only D. I, II and III
How will you describe distance from displacement? I.
A girl walking on the foot-walk from canteen to library, while her friend walk across the canteen to library. II. A boy and a girl walk slowly in the foot walk from canteen to library. A. I only B. III only 8.
C. I and III D. none of these
When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A. I and II only B. I and III only
9.
What is the speed of the tortoise if it took 5 hours t o travel a distance off 3 km? A. 1.2km/h B. 0.6km/h
10.
C. II and III only D. I, II and III
C. 2.5km/h D. 0.8km/h
Which of the following is true about the object that travels 7 meters to the left, then 3 meters up, then another 7 meters to the right? A. The displacement if the of the object is equal to 17 meters. mete rs. B. The total distance travelled of the object is equal to 17 meters. C. The displacement of the object is equal to 17meters. D. The total distance travelled by the o bject is equal to 17 meters me ters down.
11.
Which statement about the movement of an object with zero acceleration is true? A. the object must be at rest B. the object must be slowing down C. the object maybe speeding D. the object may be stopping
12.
When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A. I and II only B. I and III only
13.
C. II and III only D. I, II and III
Which of the following is true about the object that travels 10 meters west, then 4 meters North, then another 10 meters to the East? A. The displacement if the of the object is equal to 24 meters. mete rs. B. The total distance travelled of the object is equal to 24 meters. C. The displacement of the object is equal to 24 meters. D. The total distance travelled by the obje ct is equal to 24 met ers down.
14.
When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A. I and II only B. I and III only
15.
C. II and III only D. I, II and III
When is an object considered to be in motion? I. When its position changes with respect to a point of reference. II. When its distance changes with respect to a point of reference. III. When its direction changes with respect to a point of reference. A. I and II only B. I and III only
16.
It refers to the shortest distance between the object’s two positions, like the distance between its point of origin and its point of destination, no matter what path it took to get that destination. A. distance B. displacement
►
17.
C. II and III only D. I, II and III
C. motion D. speed
differentiate quantities (in terms of magnitude and direction)using the concepts of distance vs displacement and speed vs velocity Which of the following is TRUE about an object that travels 7-meters to the west, then 2-meters north, then 7-meters east? A. The displacement of the object is equal to 16 meters. B. The displacement of the object is equal to 16 meters down. C. The total distance travelled by the object is equal to 2 meters. D. The total distance traveled by the object is equal to 16 meters.
18.
Which of the following is true about the object that travels 10 meters to the left, then 5 meters up, then another 8 meters to the right? A. The displacement if the of t he object is equal to 23 meters. me ters. B. The total distance travelled of the object is equal to 23 meters. C. The displacement of the object is equal to 23 meters. D. The total distance travelled by the obje ct is equal to 23 met ers down.
19.
Which of the following is true about the object that travels 5 meters to the left, then 2 meters up, then another 5 meters to the right? A. The displacement if the of the object is equal to 12meters. B. The total distance travelled of the object is equal to 12 meters. C. The displacement of the object is equal to 12 meters down. D. The total distance travelled by the obje ct is equal to 12 met ers down.
20.
Which of the following fly the fastest? A. A heron that flies 600m in 60 seconds B. A duck that flies 60m in 5 seconds C. A seagull that flies 300m in 10 seconds D. All of them take up the same speed
21.
Which of the following is true about the object that travels 5 meters to the left, then 2 meters up, then another 5 meters to the right? A. The displacement if the of the object is equal to 12meters. B. The total distance travelled of the object is equal to 12 meters.
C. The displacement of the object is equal to 12 meters down. D. The total distance travelled by the obje ct is equal to 12 meters down. 22.
Which of the following is true about the object that travels 5 meters to the left, then 2 meters up, then another 5 meters to the right? A. The displacement if the of the object is equal to 12meters. B. The total distance travelled of the object is equal to 12 meters. C. The displacement of the object is equal to 12 meters down. D. The total distance travelled by the obje ct is equal to 12 meters down.
23.
What is the average speed of the jeepney that travel 200km in 4hours? A. 50km/hr B. 500m/s
C. 30km/hr D. 25km/hr
The data below where obtained from a 40 0-meter dash competition. Female Athlete 1 2 3 4 24.
Recorded Time 26.5 26.1 25.3 26.7
Male Athlete 1 2 3 4
Recorded Time 22.4 21.9 23.0 22.6
Which of the following states is/are true? I. The male athletes are faster than the female athletes. II. Compared to the speed of the fastest male athlete, the average speed of the fastest female athlete is slightly less. A. I only B. II only
25.
Which of the following differentiate speed from velocity? A. B. C. D.
26.
Speed describes how fast an object moves while velocity tells about speed and direction of travel Velocity describes the change in speed while speed describes the direction travel Speed describes the velocity of a moving obje ct Speed describes the time of travel while velocity describes the total displacement
In describing the motion of an object. We do not describe the speed but consider also its velocity. Which of the following describes velocity? A. 15 meter B. 15° N, 120°E
27.
C. both I and II D. Neither I nor II
C. 20 meters up D. 20 meters down
Which of the following is not acceleration? A. rate of change in velocity B. rate of change n displacement C. rate of change of speed in a particular direction D. rate of change of motion in a particular direction
28.
Which statement differentiates displacement, distance, speed and velocity? I. II. III. IV.
Displacement always follow a straight line, distance do not. Speed has no direction, velocity have. Distance is equal to displacement plus direction. Distance and displacement both have speed and velocity. A. I and II only B. II and III only
C. III and IV only D. all of the above
29.
Which does not belong to the group? A. 300 km/hr B. 20 km/s
30.
Which of the following is an example of ve locity? A. 259 meter B. 100 meter/second
31.
C. 200 km/hr D. 320 km/hr going South of Capiz
Which of the following is an example of displacement? A. 180 km/h North B. 60 km/h
32.
C. 20 m/s D. 40 m/s East
C. 20 km/h/min, 45° North of East D. 100 km, 36° West of South
Which of the following is true about the object that travels 5 meters to the left, then 2 meters up, then another 5 meters to the right? A. The total distance travelled of the object is equal to 12 meters. B. The displacement if the of t he object is equal to 12meters. C. The total distance travelled by t he object is equal to 12 meters down. D. The displacement of the object is equal to 12 meters down.
►
creates and interprets visual representation of the motion of objects such as tape charts and motion graphs
33.
Referring to the diagram above, what is the final position of the ball after 15 seconds? A. 10m B. 5m C. 15m D. 0m
34.
Which of the following graphs shows that the object’ s acceleration increase?
35.
A
B
C
D
The graph shows the process made by turtle moving along a straight line.
If the turtle keeps moving at the same speed, how long will it take to travel 12 cm? A. 12 seconds B. 20 seconds
C. 25 seconds D. 30 seconds
36.
37.
38.
Which of the following graphs shows that the object’s acceleration increase? A
B
C
D
Which of the following graphs shows that the object’ s acceleration increase? A
B
C
D
Which of the following situation represent the motion of an object? A. ball on the table B. a car moving forward
39.
40.
Which of the following graphs shows that the object’ s motion is accelerating? A
B
C
D
Martin rides a bicycle at 7m/s. Ten seconds later, he is driving at 10m/s. What is Martin’s acceleration? A. 0.3m/s B. 0.6m/s
41.
C. picture frame on the wall D. the glowing candle
C. 0.4m/s D. 0.5m/s
Which of the following graphs shows that the object’ s acceleration increase?
A
B
C
D
42.
43.
44.
45.
Which of the following graphs shows that the object’s acceleration increase? A
B
C
D
Which of the following graphs shows that the object’ s acceleration increase? A
B
C
D
Which of the following graphs shows that the object’ s acceleration increase? A
B
C
D
Which of the following graphs shows that the object’ s acceleration increase? A
B
C
D
The data below where obtained from a 40 0-meter dash competition. Female Athlete 1 2 3 4
Recorded Time 26.5 26.1 25.3 26.7
Male Athlete 1 2 3 4
Recorded Time 22.4 21.9 23.0 22.6
46. Which of the following states is/are true? I. II.
The male athletes are faster than the female athletes. Compared to the speed of the fastest male athlete, the average speed of the fastest female athlete is slightly less. A. I only B. II only
47.
C. both I and II D. Neither I nor II
Based on the diagram below, is it possible to get zero displacement?
A. B. C. D.
no, because there’s equal distance and displacement trave lled by the object yes, when the object goes back to their starting position no, because distance differs to displacement yes, distance is equal to displacement
Waves ►
48.
infers that energy, like light and sound, tr avels in the form of wave Energy from the sun reaches the earth though A. Ultraviolet waves B. Infrared waves C. Mechanical waves D. Electromagnetic waves
49.
Light is an electromagnetic wave. Which characteristic is common in all electromagnetic waves? A. speed B. frequency
50.
C. amplitude D. wavelength
Energy from the sun reaches the earth though A. Ultraviolet waves B. Infrared waves C. Mechanical waves D. Electromagnetic waves
51.
What is the movement of water molecules when a wave passes by? A. it moves in a circular motion B. it moves in all direction C. it moves in straight line D. it moves up and down
52.
Energy from the sun reaches the earth though A. Ultraviolet waves B. Infrared waves C. Mechanical waves D. Electromagnetic waves
53.
Energy from the sun reaches the earth though A. Ultraviolet waves B. Infrared waves C. Mechanical waves
D. Electromagnetic waves 54.
Sound energy can travel through transverse w ave while light energy can travel in space through… A. mechanical waves B. electromagnetic waves C. surface waves D. both A and C
55.
Mechanical Waves transport energy from one place to another through A. alternately vibrating particles of the medium. B. particles traveling with the waves. C. vibrating particles and traveling particles. D. None of the above.
56.
A pulse sent down a long string e ventually dies away and disappears. What happens to its energy? A. the energy disappears with the wave B. the energy remains along the length of the string C. the energy is transferred from the wave to the environment D. the pulse does not carry the energy
57.
Mechanical Waves transport energy from one place to another through A. alternately vibrating particles of the medium. B. particles traveling with the waves. C. vibrating particles and traveling particles. D. None of the above.
58.
Energy from the sun reaches the earth though A. Ultraviolet waves B. Infrared waves C. Mechanical waves D. Electromagnetic waves
59.
What happens when waves pass by? A. energy travels in the form of waves B. particles vibrate alternately to transport the energy of the wave C. waves can set other objects to move D. energy travels in the direction of the waves
60.
Heat of the sun is one of the reasons why life on Earth exists. The heat of the from the sun reaches the earth though A. Ultraviolet waves B. Infrared waves C. Mechanical waves D. Electromagnetic waves
61.
Energy from the sun reaches the earth though A. Ultraviolet waves B. Infrared waves C. Mechanical waves D. Electromagnetic waves
62.
Energy from the sun reaches the earth though A. Ultraviolet waves B. Infrared waves C. Mechanical waves
D. Electromagnetic waves ►
63.
explains how waves carry energy from one place to another Mechanical Waves transport energy from one place to another through A. alternately vibrating particles of the medium. B. particles traveling with the waves. C. vibrating particles and traveling particles. D. None of the above.
64. Mechanical waves transport energy from one place t o another through ____________. A. Particles traveling with the wave B. Vibrating particles and traveling particles C. Alternately vibrating particles of the me dium D. None of the above 65.
Mechanical Waves transport energy from one place to another through A. alternately vibrating particles of the medium. B. particles traveling with the waves. C. vibrating particles and traveling particles. D. None of the above.
66.
The highest point and lowest point of a wave ar e… A. amplitude B. crest and trough
67.
C. wavelength D. frequency
Mechanical Waves transport energy from one place to another through A. alternately vibrating particles of the medium. B. particles traveling with the waves. C. vibrating particles and traveling particles. D. None of the above.
68.
Mechanical Waves transport energy from one place to another through A. alternately vibrating particles of the medium. B. particles traveling with the waves. C. vibrating particles and traveling particles. D. None of the above.
69.
Which of the following statement is NOT TRUE about wave? A. Wave is a periodic disturbance that moves away from a source and carries energy with it. B. Waving of hands is a common gesture that people do to catch someone attention or to convey farewell. C. Periodic wave can be regarded as a series of pulse. D. Wave can move without force and energy.
70.
Mechanical Waves transport energy from one place to another through A. alternately vibrating particles of the medium. B. particles traveling with the waves. C. vibrating particles and traveling particles. D. None of the above.
71. In a transverse wave, the individual particles of the medium ____________. A. move in circles B. move in ellipses
C. move parallel to the direction of travel D. move perpendicular to the direction of the travel 72.
Mechanical Waves transport energy from one place to another through A. alternately vibrating particles of the medium. B. particles traveling with the waves. C. vibrating particles and traveling particles. D. None of the above.
73.
Which of the following explain how waves carry energy from one place to another? A. waves transport energy from one place to another, thus they can set objects into motion B. particles of a vibrating medium carry e nergy C. waves vibrate to the direction to where it is moving on D. waves involves motion of particles
74. A pulse sent down a long sting eventually dies away and disappears. What happens to its energy? A. the energy disappears with the wave B. the energy remains along the length of the string C. the energy is transferred from the wave to the environment D. the pulse does not carry energy 75. Waves travels and propagate. Waves that do not require medium to propagate such as television signals and x-rays are examples of … A. ultraviolet waves B. surface waves C. electromagnetic waves D. Transverse waves 76. In a transverse wave, the individual particles of the medium ____________. A. move in circles B. move in ellipses C. move parallel to the direction of travel D. move perpendicular to the direction of the travel 77. In a transverse wave, the individual particles of the medium ____________. A. move in circles B. move in ellipses C. move parallel to the direction of travel D. move perpendicular to the direction of the travel ►
78.
distinguishes between transverse and longitudinal waves and electromagnetic waves
In a transverse wave, the individual particles of the move …. A. in circles. B. in ellipse. C. parallel to the direction of travel. D. perpendicular to the direction of tr avel.
79. In a longitudinal wave, the individual particles of the medium ____________. A. move in circles B. move in ellipses C. move parallel to the direction of travel D. move perpendicular to the direction of the travel
80. In a transverse wave, the individual particles of the medium ____________. A. move in circles B. move in ellipses C. move parallel to the direction o f travel D. move perpendicular to the direction of the travel 81.
Energy from the sun reaches the earth through A. mechanical waves B. transverse waves C. longitudinal waves D. electromagnetic waves
82.
_________ waves occur when the individual particles of a medium move perpendicular to the direction of travel, while_____________ waves occur when the individual particles of a medium vibrate back and forth in the direction and ______________ waves do not require a medium to propagate. 1. transverse waves 2. longitudinal waves 3. electromagnetic waves A. II, III and I B. III, II and I
C. I, II and III D. III, I and II
83. In a transverse wave, the individual particles of the medium ____________. A. move in circles B. move in ellipses C. move parallel to the direction of travel D. move perpendicular to the direction of the travel 84.
In transverse wave, the individual particles of the medium wave perpendicular to wave direction while longitudinal waves the individual particles of the medium vibrate back and forth to wave direction but electromagnetic waves… A. can travel with material medium for their passage. B. can travel without material medium for t heir passage. C. can travel in a circular pattern to the direction of wave. D. can travel in space both circulating and alternating wave pattern.
85.
In a transverse wave, the individual particles of the move …. A. in circles. B. in ellipse. C. parallel to the direction of travel. D. perpendicular to the direction of travel.
86.
Energy from the sun reaches the earth through A. mechanical waves B. transverse waves C. longitudinal waves D. electromagnetic waves
87. Using a spring, a portion of the wave is alternately compressed and extended. What kind of wave is produced? A. transverse waves B. longitudinal waves C. chemical waves D. electromagnetic waves
88. Which statement distinguishes transverse, longitudinal and electromagnetic waves? A. transverse and longitudinal waves are mechanical waves B. transverse and longitudinal waves need medium of waves propagation while electromagnetic wave does not C. both mechanical and electromagnetic wave have ener gy D. both travel in the same direction 89.
In a transverse wave, the individual particles of the medium ____________. A. move in circles B. move in ellipses C. move parallel to the direction of travel D. move perpendicular to the direction of the travel
90.
Waves occur when the individual particles of a medium move perpendicular to the direction of travel. A. mechanical waves B. longitudinal waves C. electromagnetic waves D. transverse waves
91.
Which of the following shows the interval that re presents a half wavelength?
A. A to E 92.
B. B to F
C. A to B
D. C to E
Mechanical waves transport energy from one place to another through alternately vibrating particles of medium while electromagnetic wave… A. needs medium too B. travels in vibrating particles C. travels without medium D. none of the choices
►
use a model to demonstrate a relationship among frequency, amplitude, wavelength, and wave velocity
93.
The amplitude of the wave in the diagram above is given by letter _____. A. B B. C C. A D. E
94.
The wavelength of the wave in t he diagram below is given by a letter …
A. A to E
B. B to F
C. A to B
D. C to E
Consider the diagram below to answer the question.
95.
The wavelength of the wave in t he diagram above is given by letter ___. Ans. A
96.
Supposed you observed an anchored boat to rise and full once every 4.0 seconds as waves whose crest are 25 meters apart pass by it. What is the frequency of the observed waves? A. the frequency of the waves is 0.25Hz B. the frequency of the waves is 0.35Hz C. the frequency of the waves is 0.45Hz D. the frequency of the waves is 0.55Hz
97.
What is the relationship between wave speed, wavelength and frequency? A. wave speed is equal to frequency time wavelengths B. wave speed is equal to frequency divided by wavelength C. wave speed is equal to frequency plus wavelength D. wave speed is equal to frequency less wavelength
98. The higher the frequency of a wave, A. the lower its circles B. the shorter its wavelength 99.
C. the greater its amplitude D. the longer its period
The higher the frequency of the wave… A. the lower its speed B. the shorter its wavelength C. the greater its amplitude D. the longer its period
100. The higher the frequency of a wave, A. the lower its circles B. the shorter its wavelength
C. the greater its amplitude D. the longer its period
101. Energy from the sun reaches the earth through A. ultraviolet waves B. infrared waves C. mechanical waves D. electromagnetic waves 102. The vibration of frequency 5Hz sends a wave of wavelength 0.8m down a rope. What is the speed of the wave? A. 4m/s C. 5m/s B. 6.45m/s D. 2m/s 103. Which of the following shows the interval that re presents a half wavelength?
A. A to E
B. B to F
C. A to B
D. C to E
104. (Refer to the diagram below) A string of guitar is being plucked in 1 second. Set A is pluck slowly while set B is plucked forcedly. What is true on the situation?
A. the higher the frequency the shorter the wavelength B. the lower the frequency the longer the wavelength C. the higher the frequency the longer the wavelength D. there is no correlation in both situations 105. Which of the following demonstrate on inverse relationship among frequency, amplitude, wavelength and wave velocity?
106. The higher the frequency of a wave, A. the lower its circles B. the shorter its wavelength
C. the greater its amplitude D. the longer its period
107. Compare the frequency and energy carried by UV waves to that of visible light, the UV waves have… A. high energy B. low energy C. no energy D. did not carry energy 108. The higher the frequency of a wave, A. the lower its circles B. the shorter its wavelength
C. the greater its amplitude D. the longer its period
109. Of the following properties of wave, the one that is independent of the others is its … A. amplitude B. wave speed
C. wavelength D. frequency
Sound ►
uses the concepts of wavelength, velocity and amplitude to describe characteristics of sound such as pitch, loudness and quality
110. Which of the following best describes a high frequency sound? It has … A. low pitch B. high pitch
C. low energy D. A and C
111. Which of the following best describes a low frequency sound? It has … A. low pitch B. low energy
C. high pitch D. A and C
112. Which of the following best describes a high frequency sound? It has … A. low pitch B. high pitch
C. low energy D. A and C
113. Sound waves are example of … A. transverse wave B. standing wave
C. longitudinal wave D. elastic wave
114. Which of the following best describes a high frequency sound? It has … A. low pitch B. high pitch
C. low energy D. A and C
115. Which of the following best describes a high frequency sound? It has … A. low pitch B. high pitch
C. low energy D. A and C
116. When can we say that a sound has a high pitch, if it has… A. high energy B. low frequency
C. high frequency D. high wavelength
117. Which of the following best describes a high frequency sound? It has … A. low pitch B. high pitch
C. low energy D. A and C
118. Which of the following best describes a high frequency sound? It has … A. low pitch B. high pitch
C. low energy D. A and C
119. Which of the following best describes a high frequency sound? It has … A. low pitch B. high pitch
C. low energy D. A and C
120. What happens to the pitch of t he sound when the frequency is high? A. the pitch is also high B. the pitch is low
C. the pitch is alternately high and low D. the pitch is not affected
121. Which of the following best describes a high frequency sound? It has … A. low pitch B. high pitch
C. low energy D. A and C
122. The higher the frequency of a sound wave the … A. higher the pitch B. greater the speed
C. shorter the wavelength D. greater amplitude
123. Which of the following best describes a high frequency sound? It has … A. low pitch B. high pitch
C. low energy D. A and C
124. Which of the following best describes a high frequency sound? A. low pitch B. high pitch
C. low energy D. A and C
125. High amplitude sounds usually carry large energy and have higher intensity while low amplitude sound… A. carry lesser amount of energy C. carry greater amount of energy B. higher intensity D. no pitch ►
demonstrates changes in pitch and loudness using real and improvised musical instruments trough fair testing
126. Compared to a thin string of the same length and tightness a thick string produces sound of _______. A. the same pitch C. higher pitch B. lower pitch D. lower then higher pitch 127. Compared to a thick string of the same length and tightness a thin string produces sound of _______. A. lower pitch C. the same pitch B. higher pitch D. lower then higher pitch 128. In the “Sounding Box”, compared to a thin rubber band of the same length and tightness a thick string produces sound of ____________? A. the same pitch B. lower pitch
C. higher pitch D. lower then higher pitch
129. Sound is heard much louder when it tr avels in… A. Air B. gas
C. liquid D. solid
130. Compared to a thin string of the same length and tightness a thick string produces sound of _______. A. the same pitch C. higher pitch B. lower pitch D. lower then higher pitch 131. Compared to a thin string of the same length and tightness a thick string produces sound of _______. A. the same pitch C. higher pitch B. lower pitch D. lower then higher pitch 132. Which of the following strings of an improvised musical instrument produces low sound? A. long and thin string B. long and thick string
C. short and thin string D. short and thick string
133. Compared to a thin string of the same length and tightness a thick string produces sound of _______. A. the same pitch C. higher pitch B. lower pitch D. lower then higher pitch 134. Compared to a thin string of the same length and tightness a thick string produces sound of _______. A. the same pitch C. higher pitch B. lower pitch D. lower then higher pitch 135. Compared to a thin string and a thin rubber band it produces sound of… A. higher pitch B. lower pitch
C. lower and higher pitch D. B and C
136. A man plucked the thin string. What do you think is the sound produce? A. soft B. melodic
C. loud D. low
137. Which of the following objects will produce sound? A. soft drink B. radio station
C. vibrating objects D. objects under pressure
138. Compared to a thin string of the same length and tightness a thick string produces sound of _______. A. the same pitch C. higher pitch B. lower pitch D. lower then higher pitch 139. In a string instrument like guitar, the thick strings will produce … A. low pitch B. high pitch
C. low energy D. low and high pitch
140. Compared to a thin string of the same length and tightness a thick string produces sound of _______. A. the same pitch C. higher pitch B. lower pitch D. lower then higher pitch 141. The pitch of a high frequency is … A. low B. high ►
C. moderate D. no pitch
explains sound production in human voice box and how pitch, loudness and quality of sound vary from one person to another
142. Which of the following can transmit sound faster? A. wood
B. air
C. steel
D. water
143. Pitch refers to the highness or lowness of sound. Which of the following reasons explain why pitch varies from one person to another? A. human being’s voice box differ in thickness B. pitch differs because some people can stretch their voice box while some cannot C. both A and B are correct D. none of the above 144. The loudness of sound wave detected by human ear is mostly determined by the waves… A. amplitude
B. intensity
C. speed
D. frequency
145. People change the pitch of their voice by adjusting the opening of their vocal chords; when the opening is small; the pitch is __________, when the opening is wide, the pitch is ______________. A. high; low B. low; high
C. low; low D. high; high
146. When we talk or make any sound, our vocal cords vibrate and sound is produced. This sound wave is a ____________. A. longitudinal wave B. transverse wave
C. surface waves D. shock wave
147. Which of the following medium does the sound can travel fastest and slowest? A. sound can travel fastest in solid and slowest in gas. B. sound can travel fastest in liquid and slowest in solid. C. sound can travel fastest in gas and slowest in liquid. D. sound can travel fastest in solid and gas the n slowest in liquid.
148. Which of the following is not capable of transmitting sound? A. air
B. water
C. steel
D. vacuum
149. How does sound production varies from one person to another? A. shape and size of the mouth B. shape and size of the voice box
C. vibration of vocal chords D. all of the above
150. Which of the following is not capable of t ransmitting sound? A. air
B. water
C. steel
D. vacuum
151. It is a psychological sensation that differs for different people. A. pitch B. loudness
C. intensity D. quality
152. John shouted very loud. Which part of his body do you t hink the sound came from? A. in the stomach B. in the vocal chords
C. in the mouth D. in the esophagus
153. Which of the following is not capable of tr ansmitting sound? A. air
B. water
C. steel
D. vacuum
154. ______________ is produced when there is a vibration of vocal chords. A. waves
B. sound
C. light
D. all of the above
155. Which of the following would most likely transmit sound best? A. steel in cabinet B. water in the ocean
C. air in your classroom D. water in a swimming pool
156. In human ear, the __ collects sound waves and focuses them into ear canal. This canal transmits the sound waves to the eardrum. A. hammer B. tympanum ►
C. pinna D. stirrup
describes how organisms produce, transmit and receive sound of various frequencies (infrasonic, audible and ultrasonic sound)
157. Which of the following would most likely transmit sound best? A. steel in cabinet B. water in the ocean
C. air in your classroom D. water in a swimming pool
158. Of the following source of sound, which is considered as infrasonic? A. breathing B. amplified rock music
C. old subway train D. jet engine
159. Vibrational frequency beyond 20000Hz is called ultrasonic frequencies while extremely low frequencies are known as infrasonic frequencies. Which of the following animals can detect sounds as high as 100000Hz A. human beings B. cats
C. dogs D. bats
160. Which of the following is a stringed musical instrument? A. trumpet B. violin
C. drum D. saxophone
161. Which of the following CANNOT detect ultrasonic or infrasonic waves? A. dog B. bat
C. cat D. human
162. Vibrational frequency beyond 20000Hz is called _________________ while extremely low frequencies are known as __________________. A. ultrasonic; infrasonic B. infrasonic; ultrasonic
C. internal; external D. low; high
163. Which of the following is not capable of tr ansmitting sound? A. air B. water
C. steel D. vacuum
164. Which of the following range of frequency do the dogs and bats detect sound? When human ear can detect sound at a frequency of 20 – 20,000Hz. A. dogs 50,000Hz above, bats 100,000Hz above B. dogs 30,000Hz above, bats 90,000Hz above C. dogs 100,000Hz above, bats 50,000Hz above D. dogs 25,000Hz above, bats 30,000Hz above 165. Which of the following would most likely transmit sound best? A. steel in cabinet B. water in the ocean
C. air in your classroom D. water in a swimming pool
166. Bats produce ultrasonic sound or ultrasound to locate its prey during nighttime. How do these organisms generate the sound? A. bats generate less than 20 kHz B. bats generate more than 20 kHz
C. bats generate 20 kHz D. none of the above
167. Which of the following would most likely transmit sound best? A. steel in cabinet B. water in the ocean
C. air in your classroom D. water in a swimming pool
168. Which of the following best describes a high frequency sound? It has … A. low pitch B. high pitch
C. low energy D. A and C
169. How do birds communicate with each other? A. by their sound B. by its color of the feather
C. when they fly D. by talking
170. Organisms like us are capable of sensing through our ears and can sense within the frequency range of … A. 20 – 20,000Hz C. 50,000Hz B. 20,000 beyond D. 100,000Hz 171. Our ear is a sensitive part of our body that belongs to peripheral auditory system. It can sense frequency of _______. A. 20 – 20,000Hz
C. 25 – 25,000Hz
B. 10 – 10,000Hz
D. 60 – 60,000Hz
172. Which of the following is not capable of t ransmitting sound? A. air B. water
C. steel D. vacuum
173. Our ear cannot detect ultrasonic or infrasonic waves. But some animals like dogs can hear sounds as high as 50,000Hz while bats can detect sounds as high as 100,000 Hz. What frequency of sound are those? A. infrasonic frequencies C. physician’s frequency B. ultrasonic frequencies D. intersonic frequencies Light ►
relates characteristics of light such as color and intensity to frequency and wavelength
174. ROYGVIB is the basic component of white light. Which color of light carries the lowest fre quency? A. Red
B. Blue
C. Green
D. orange
175. Light is an electromagnetic wave. W hich characteristic is common in all electromagnetic waves? A. frequency B. speed
C. wavelength D. amplitude
176. Which of the following statement is NOT TRUE? A. violet has the highest frequency and highest w avelength B. violet has the highest frequency and shortest wavelength C. Red has lowest frequency and longest wavelength D. All of the above statements are false 177. The person who discovered the Electromagnetic Theory of Light is ______. A. Isaac Newton B. James Clark Maxwell
C. Pierre Curie D. James Watson
178. How does the wavelength of infrared (IR) compare with the wavelength of ultraviolet (UV) waves? A. infrared waves have longer wavelength B. infrared waves have shorter wavelength C. IR waves have the same wavelength as the UV waves D. IR is not comparable in wavelength with UV waves 179. How does the wavelength of infrared (IR) compare with the wavelength of ultraviolet (UV) waves? A. infrared waves have longer wavelength B. infrared waves have shorter wavelength C. IR waves have the same wavelength as the UV waves D. IR is not comparable in wavelength with UV waves 180. Which f the following frequency of sound can be considered as very loud or distorted sound? A. infrasonic sound B. ultrasonic sound
C. audible sound D. both A and B
181. How does the wavelength of infrared (IR) compare with the wavelength of ultraviolet (UV) waves? A. infrared waves have longer wavelength B. infrared waves have shorter wavelength C. IR waves have the same wavelength as the UV waves D. IR is not comparable in wavelength with UV waves
182. ROYGVIB is the basic component of white light. Which color of light carries the lowest frequency? A. Red
B. Blue
C. Green
D. orange
183. How does the wavelength of infrared (IR) compare with the wavelength of ultraviolet (UV) waves? A. infrared waves have longer wavelength B. infrared waves have shorter wavelength C. IR waves have the same wavelength as the UV waves D. IR is not comparable in wavelength with UV waves 184. ROYGVIB is the basic component of white light. Which color of light carries less energy? A. Blue
B. Green
C. Orange
D. Red
185. How does the wavelength of infrared (IR) compare with the wavelength of ultraviolet (UV) waves? A. infrared waves have longer wavelength B. infrared waves have shorter wavelength C. IR waves have the same wavelength as the UV waves D. IR is not comparable in wavelength with UV waves 186. How does the wavelength of infrared (IR) compare with the wavelength of ultraviolet (UV) waves? A. infrared waves have longer wavelength B. infrared waves have shorter wavelength C. IR waves have the same wavelength as the UV waves D. IR is not comparable in wavelength with UV waves 187. Which of the following color of light carr ies most of the energy? A. Blue
B. Green
C. Orange
D. Red
188. Which of the following color of light carr ies most of the energy? A. Blue
B. Green
C. Orange
D. Red
C. colors
D. mechanical
189. The following are properties of light EXCEPT? A. brightness ►
B. intensity
designs and implements and experiment that shows that light travels in a straight line
190. ROYGVIB is the basic component of white light. Which color of light carries less energy? A. Blue
B. Green
C. Orange
D. Red
191. What evidence is illustrated based on the diagram below? A. light is absorbed B. light is a form of radiation C. light is reflected D. light travels in a straight line
192. Variations in the refraction of color lights dependent on the frequencies and wavelength of the color lights, this brings about blue light being refracted more than the other color lights and thus appears to be bent. However, light travels in a ___________ line in a particular medium. A. circular B. curve
C. straight D. broken
193. Observe the shadow cast by the object shown below. The illustration suggest that
A. light is reflected B. light is absorbed
C. light is a form of radiation D. light travels in a straight line
194. According to fair testing that the relation of light intensity and distance from light source is… A. the farther the distance from the light source is the lesser its light intensity B. the nearer the distance from the light source is the lesser its light intensity C. the farther the distance from the light source the dimmer its light intensity D. the nearer the distance from the light source is the lower its light intensity 195. Among all the electromagnetic waves (EM), which has the highest frequency? A. infrared radiation B. radio wave
C. ultraviolet D. gamma rays
196. Observe the shadow cast by the object shown below. The illustration suggests that…
A. light is reflected B. light travels in a straight line C. light is absorbed D. light is a form of radiation 197. Light is an electromagnetic wave. Which characteristic is common in all electromagnetic waves? A. amplitude B. frequency
C. speed D. wavelength
198. Light is an electromagnetic wave. Which characteristic is common in all electromagnetic waves? A. amplitude B. frequency
C. speed D. wavelength
199. Which is the correct way how light travels? 200. What evidence is illustrated based on the diagram below…
A. light is absorbed B. light is reflected C. light is a form of radiation D. light travels in a straight line 201. It is a special kind of refraction that provides us color of light. This phenomenon is observed when white light passes through a prism and travels. A. dispersion B. visible spectrum C. deflection
D. magnetism 202. How does the wavelength of infrared (IR) compare with the wavelength of ultraviolet (UV) waves? A. infrared waves have longer wavelength B. infrared waves have shorter wavelength C. IR waves have the same wavelength as the UV waves D. IR is not comparable in wavelength with UV waves 203. A phenomenon in which a prism separates white light into its components colors… A. dispersion B. distortion C. delusion D. radiation 204. investigate the relationship between light intensity and the distance from light source through fair testing 205. How does the wavelength of Gamma-Ray compare with the wavelength of X-ray waves? A. Gamma ray waves have longer wavelength B. Gamma ray waves have shorter wavelength C. Gamma ray waves have the same wavelength as the X-ray waves D. Gamma ray is not comparable in wavelength w ith the X-ray waves 206. How would you relate the brightness or inte nsity of light with the distance from the source? A. the nearer the light source, the dimmer is the light and the lower intensity B. the farther the light source, the dimmer is the light and the lower intensity C. the nearer the light source, the brighter is the light and the lower intensity D. the farther the light source, the brighter is the light and the higher the intensity 207. How would you relate the brightness or intensity of light with the distance from the source? A. the farther the source, the brighter is the light and the lower the intensity B. the farther the light source, the dimmer is the light and the lower the intensity C. the nearer the light, the dimmer is the light and the lower the intensity D. both B and C 208. Based on the experiment result in the diagram below, the light travel in straight line if the surface is…
A. rough B. smooth
C. wrinkled D. both A and B
209. ROYGVIB is the basic component of white light. Which color of light carries less energy? A. Blue
B. Green
C. Orange
D. Red
210. How do we relate the brightness or intensity of light with the distance from the source? A. the farther the distance, the light becomes dimmer B. the nearer the distance, the light becomes dimmer C. the nearer the distance, the light becomes blurry D. no effect in the brightness regardless of the distance from the source
211. ROYGVIB is the basic component of white light. Which color of light carries less energy? A. Blue
B. Green
C. Orange
D. Red
212. How does the wavelength of infrared (IR) compare with the wavelength of ultraviolet (UV) waves? A. infrared waves have longer wavelength B. infrared waves have shorter wavelength C. IR waves have the same wavelength as the UV waves D. IR is not comparable in wavelength with UV waves 213. Which of the following absorbs light fully? A. yellow
B. black C. green
D. white
214. What happen to the brightness or inte nsity of light with the distance from the source? A. the farther the light source, the dimmer is the light and the lower intensity B. the nearer the light, the lower intensity C. the lower the intensity, the brighter the light D. the higher the intensity, the dimmer the light 215. Light is an electromagnetic wave. Which characteristic is common in all electromagnetic waves? A. speed B. amplitude
C. frequency D. wavelength
216. Among all the electromagnetic waves (EM), which has the highest frequency? A. infrared radiation B. radio wave
C. ultraviolet wave D. gamma rays
217. Sometimes you see a rainbow during a rain shower or shortly afterward. This happen because… A. rainbow is formed when light traveling in a straight line is blocked by a material B. rainbow act like tiny prisms that refract and reflect sunlight and separate it into its component colors C. light entering the diamond reflects to the clouds D. its magic that causes rainbow Heat ►
infers the conditions necessary for heat transfer to occur
218. To most Filipinos, lechon is a part of their occasion. How does heat travel in roasting lechon? A. by conduction B. by convection
C. by radiation D. by compaction
219. The mother cooked arroz caldo using kettle . How does heat travel through kettle? A. by radiation B. by dispersion
C. by convection D. by conduction
220. Heat is a form of energy that refers to the thermal energy that is in the process of being transferred. Which of the following statement is NOT CORRECT? A. Heat is transferred from a cooler object to a warmer object. B. Heat is transferred from warmer object to a cooler object. C. Heat transfer will continue to occur as long as there is a temperature difference. D. For heat transfer to take place, objects must be of different temperature.
221. How does heat transfer? I. It transfers from an object of lower temperature to an object of higher temperature. II. It transfers from an object of higher temperature to an object of lower temperature. III. It transfers from an object with equal temperature. A. I and II only B. II and III only
C. I, II and III only D. II only
222. What is the condition necessary for heat transfer to take place between objects? A. the objects must have the same temperature B. the objects must be of different temperature C. the objects must have constant temperature D. both A and B 223. A red-hot iron nail is placed into a kettle or boiling water. Which statement correctly explains the resulting heat transfers? A. Heat flows from the water to the iron nail because boiling water has more thermal energy B. Heat flows from the water to the iron nail since the water molecules have a higher average kinetic energy C. heat flows from the iron nail to the water since the iron nail is at higher temperature D. heat flows out of the kettle to the cooler surrounding air 224. Light is an electromagnetic wave that travels in space without material medium. Which characteristic of light is different from other electromagnetic wave form? A. frequency B. intensity
C. color D. wavelength
225. How does heat travel through a pan? A. by radiation B. by convection
C. by dispersion D. by conduction
226. Heat transfer by convection may occur in which of the following? A. metals only B. fluids only
C. nonmetallic solids D. in a vacuum
227. How does heat travel through a pan? A. by radiation B. by convection
C. by dispersion D. by conduction
228. Your mother serves you with a hot soup at breakfast. How does heat travel t hrough the soup? A. by radiation B. by convection
C. by dispersion D. by conduction
229. Which of the following situation best describes that conduction takes place? A. conduction takes place between objects that are in contact with each other B. the energy from the object of higher temperature is transferred to the other object through their particles C. A and B D. none of these
230. Heat is transferred to or from solids by… A. convection B. radiation
C. conduction D. all of the above
231. It is related to the change on temperature or change in the relative hotness or coldness of an object. A. refraction C. conductivity B. heat transfer D. capillary 232. Betchay is making a noodle soup using a pan made of metal. How does heat travel through a pan? A. by radiation B. by convection
C. by dispersion D. by conduction
233. Method of heat transfer where heat energy travels when two objects are in direct contact and are not equal temperatures. A. radiation B. conduction ►
C. convection D. mechanical
explains different modes of heat transfer in terms of movement of particles
234. Which of the following situations happen because of convection? A. Heat from the sand felt by the person walking on the beach. B. Heat from the sun felt by a person lying on the beach. C. Sea breeze felt by a person sitting by the beach. D. Clouds forming over the beach. 235. In what direction does heat transfer/travel though arroz caldo? A. from bottom to top B. from top to bottom
C. both A and B D. neither A nor B
236. Andrea is preparing a noodle soup using a pan made of metal. How does heat travel through the soup? A. by radiation C. by dispersion B. by convection D. by conduction 237. When the object becomes warmer it means that he object _____________. A. it gained energy B. it losses energy
C. it transfer energy to another object D. none of the above
238. One of the methods by which heat is transferred from the object of higher temperature to other object through their particles that are close or in contact with each other. A. convection B. radiation
C. conduction D. none of the above
239. Heat is best transferred to or from solids by … A. convection B. radiation
C. conduction D. all of the above
240. How does heat travel through a pan? A. by radiation B. by convection
C. by dispersion D. by conduction
241. How does heat travel through the soup? A. by radiation B. by convection
C. by dispersion D. by conduction
242. Which of the following is a poor conductor? A. air
B. copper
C. gold
D. ice
243. How does heat travel through the soup? A. by radiation B. by convection
C. by dispersion D. by conduction
244. What happens when air is heated? A. it rises B. it stays in place
C. it spread in all direction D. it move toward the lower elevation
245. Which of the following situations happen because of convection? A. heat from the sand felt by the person walking on the beach B. heat from the sun felt by a person lying on the beach C. sea breeze felt by a person sitting by the beach D. clouds forming over the beach 246. A mother is cooking in a pan. Which of the following methods of heat transfer is NOT taking place in a given situation? A. convection C. conduction B. radiation D. none of them 247. Heat transfer takes place when there is a vibrating and colliding particle of objects that are in contact. A. conduction C. convection B. radiation D. all of the above 248. How does heat travel through the soup? A. by radiation B. by convection
C. by dispersion D. by conduction
249. The heat in fluids is transferred to cooler regions by currents. These currents are caused by warmer and less dense “pockets” of fluids rising in cooler and move dense surroundings. A. radiation C. convection B. conduction D. mechanical ►
identifies poor and good conductor of heat transfer in te rms of movement of particles
250. Why are cooking utensils provided with wooden handles? A. Wood is cheaper than steel. B. Wood is light and easy to handle. C. Wood is a poor conductor of heat. D. Wood is more attractive than steel 251. Which of the following explains why the lady/mother is able to hold the handle of the kettle with her bare hands? 1. The handle has high thermal energy. 2. The handle has low thermal conductivity. 3. The handle is made of good insulator of heat. A. I and II only B. I and III only
C. II and III only D. I, II and III
252. Which of the hands? 1. 2. 3.
following explains why Andrea is able to hold the handle of the pan with her bare The handle is made of good insulator of heat. The handle has low thermal conductivity. The handle has high thermal energy. A. I and II only B. I and III only
C. II and III only D. I, II and III
253. Objects that conduct heat poorly ar e particularly called ___________. A. conductor B. insulators
C. convection D. dispersion
254. ____________ is a good conductor of heat; while ____________ is the poorest conductor of heat. A. silver; paper B. paper; cloth
C. aluminum foil; copper D. glass; wood
255. To most Filipinos, lechon is a part of their occasion. How does heat travel in roasting lechon? A. by conduction B. by convection
C. by radiation D. by compaction
256. In what direction does heat travel through the soup? A. by radiation B. by convection
C. by dispersion D. by conduction
257. In what direction does heat transfer though the soup? A. from top to bottom B. from bottom to top
C. both A and B D. neither A nor B
258. Foam cups are used to keep lemonade cold for hours because Styrofoam is a good… A. color C. insulator B. conductor D. string material 259. In what direction does heat transfer though the soup? A. from top to bottom B. from bottom to top 260. Which of the hands? 1. 2. 3.
C. both A and B D. neither A nor B
following explains why the lady is able to hold the handle of the pan with her bare The handle is made of good insulator of heat. The handle has low thermal conductivity. The handle has high thermal energy. A. I and II only B. I and III only
C. II and III only D. I, II and III
261. Solids that conduct heat better are good conductors of heat. Which of the following materials are not good conductors of heat? A. silver spoon, gold ring B. aluminum pots, copper wire C. ice, rubber tire D. none of these 262. Which of the following is good conductor of heat? A. glass B. metals
C. porcelain D. head rubber
263. Which of the hands? 1. 2. 3.
following explains why the lady is able to hold the handle of the pan with her bare The handle is made of good insulator of heat. The handle has low thermal conductivity. The handle has high thermal expansion. A. I and II only B. I and III only
C. II and III only D. I, II and III
264. In what direction does heat transfer though the soup? A. from top to bottom B. from bottom to top
C. both A and B D. neither A nor B
265. Materials whose electric charges are free to move within are called conductors. The following materials are examples of conductors EXCEPT. A. silver C. conductor B. iron D. rubber ►
identifies good and poor conductor of heat and describe the ir specific uses
266. In a desert, it is hot in the daytime and cold at night. The walls of houses there are often made of mud. It is important that the walls are thick. What is the direction of the flow of heat through the wall in the daytime? A. Heat transfer is not evident in a desert. B. In the daytime, heat flows from the outside to the inside. C. In the daytime, heat flows from the inside to the outside. D. Heat transfers from object with low temperature to the one with higher temperature. 267. Of the following materials, which is a good conductor of heat? A. wood
B. water
C. steel
D. soil
268. Which of the following is a good conductor of heat? A. pan B. polypropylene plastic
C. pot holder D. water
269. Which of the objects are considered good conductors of heat? A. metals B. stone 270. Which of the hands? 1. 2. 3.
following explains why Andrea is able to hold the handle of the pan with her bare The handle is made of good insulator of heat. The handle has low thermal conductivity. The handle has high thermal energy. A. I and II only B. I and III only
271. Which of the hands? 1. 2. 3.
C. glass D. paper
C. II and III only D. I, II and III
following explains why mother is able to hold the handle of the pan with her bare The handle is made of good insulator of heat. The handle has low thermal conductivity. The handle has high thermal energy. A. I and II only B. I and III only
C. II and III only D. I, II and III
272. Which of the following explains why the lady is able to hold the handle of the pan with her bare hands?
1. The handle is made of good insulator of heat. 2. The handle has low thermal conductivity. 3. The handle has high thermal energy. A. I and II only B. I and III only
C. II and III only D. I, II and III
273. A metal screw cap of a bottle will not turn when trying to remove it. It is placed under hot water for a few minutes. The metal cap then turns easily. This is due to the fact that… A. water is liquid B. the metal cap is solid 274. Which of the hands? 1. 2. 3.
C. matter contracts when cooled D. matter expands when heated
following explains why the lady is able to hold the handle of the pan with her bare The handle is made of good insulator of heat. The handle has low thermal conductivity. The handle has high thermal energy. A. I and II only B. I and III only
C. II and III only D. I, II and III
275. Why are cooking utensils provided with wooden handles? A. wood is cheaper than steel B. wood is light and easy to handle Electricity C. wood is a poor conductor of heat D. it move toward the lower elevation 276. Thermos bottle used to hold hot liquid for a long time. Which of the following parts of the thermos bottle conducts heat poorly? A. stopper B. vacuum 277. Which of the hands? 1. 2. 3.
C. ceramic base D. outer casing
following explains why the lady is able to hold the handle of the pan with her bare The pan is made of good insulator of heat. The pan has low thermal conductivity. The handle has high thermal expansion. A. I and II only B. I and III only
C. II and III only D. I, II and III
278. Copper is a good conductor of heat and electricity. It classifies as… A. insulators B. neutral
►
C. conductor D. charges
differentiates the three types of charges
279. If you comb your hair and the comb becomes positively charged, what will happen to your hair? A. It will remain uncharged. B. It will be repelled by the comb. C. It will become positively charged. D. It will become negatively charged . 280. It is a positively charged particle. A. electron
B. proton
C. Neutron
D. Neutral
281. A charged object is brought near a metal ball that is mounted on a rubber sheet. If the metal ball acquired a negative charge of the object that was brought near it? A. neutral B. positive C. negative D. Cannot determine from the given information alone 282. Charges cannot be created nor destroyed, but can be transferred from one material to another. A. Law of Inertia B. Law of Thermodynamics
C. Electrostatic Law D. Law of Conversation of Change
283. A charged object is brought near a metal ball that is mounted on a rubber sheet. If the metal ball acquired a negative charge after it was grounded momentarily, what must be the charge of the object that was brought near it? A. neutral B. positive C. negative D. Cannot determine from the given information alone 284. Positively charged means it lost some electrons while negative ly charged has _____________. A. gained electron B. lost electrons C. both A and B D. A only 285. There are three types of charges the positive, negative and neutral charges. What will happened when two unlike charges like positive and negative are brought together? A. they will repel each other B. they will attract each other C. they will neutralize each other D. they will have no effect on each other 286. What will happen when two like charges are brought together? A. they will repel each other B. they will attract each other C. they will neutralize each other D. they will have no effect on each other 287. Which among the three charges orbit around the nucleus and are negatively charge? A. protons
B. electrons
C. neutron
D. none of the above
288. Which of the following describes the usual way by which a material can gain a positive charge? A. by gaining protons B. by gaining electrons C. by losing protons D. by losing electrons 289. A charged object is brought near a metal ball that is mounted on a rubber sheet. If the metal ball acquired a negative charge after it was grounded momentarily, what must be the charge of the object that was brought near it? A. neutral B. positive C. negative D. Cannot determine from the given
290. Which statement best refers to Electrostatic Law? A. like charges repels and unlike charges attract B. unlike charges repels and like charges attract C. A and B D. none of these 291. Which of the following can be attr acted by a positively charges object? A. another positively charges object B. any other object C. a neutral object D. no other object 292. It refers to uncharged charge. A. neutrons
B. electrons
C. proton
D. all of the above
C. neutron
D. quartz
293. Which of the following is a positively charged ion? A. protons
B. electrons
294. Atoms have electric charge inside them, the particles that carries positive charge is called … A. electron
►
B. protons
C. neutron
D. photons
demonstrates the different types of charging processes
295. The figure shows three pairs of plate. The electrostatic force between the plates is shown for two of the pairs. If B is negative, what is the charge of A? and what kind of force exists in the third pair?
A. negative, attractive B. negative, repulsive
C. positive, attractive D. positive, repulsive
296. Which of the following can be attr acted by a positively charged object? A. Any other object B. A neutral object
C. Another positively charged object D. No other object
297. Which of the following exhibits charging y induction? A. Touching the sticky side of adhesive tape B. Rubbing the balloon against your classmates wet hand C. Touching the soft drink can which was placed near a charged balloon D. Letting the charged softdrink can comes in contact with a neutral softdrink can 298. If you comb your hair and the comb becomes positively charged, what will happen to your hair? A. it will be repelled by the comb B. it will remain uncharged C. it will become positively charged D. it will become negatively charged
299. The figure shows three pairs of plate. The electrostatic force between the plates is shown for two of the pairs. If B is negative, what is the charge of A? and what kind of force exists in the third pair?
A. negative, attractive B. negative, repulsive
C. positive, attractive D. positive, repulsive
300. The figure shows three pairs of plate. The electrostatic force between the plates is shown for two of the pairs. If B is negative, what is the charge of A? and what kind of force exists in the third pair?
A. negative, attractive B. negative, repulsive
C. positive, attractive D. positive, repulsive
301. Discharging is the process of removing excess charges on an object while grounding is a pr ocess of providing path between the charged object and the ground, what is the importance of grounding? A. it can transfer electrons from or to charge object in order to neutralize it B. it is necessary in electrical device and equipment so that it prevent the build u f excess charges where it is not needed. C. it will add charges to the appliances D. both A and C 302. Which of the following describes the usual way by which a material can gain a positive charge? A. by gaining protons B. by gaining electrons C. by losing protons D. by losing electrons 303. If you comb your hair and the comb becomes positively charged, what will happen to your hair? A. it will be repelled by the comb B. it will remain uncharged C. it will become positively charged D. it will become negatively charged 304. A neutral metal sphere is touched by a negatively charged metal rod. A s a result, what will happen to the metal sphere? A. positive charged C. neutral B. negative charged D. much more massive 305. Which of the following can be attr acted by a positively charged object? A. another positively charged object B. any other object
C. a neutral object D. no other object
306. If you comb your hair and the comb becomes positively charged, what will happen to your hair? A. it will be repelled by the comb B. it will remain uncharged C. it will become positively charged D. it will become negatively charged
307. Which statement best describes the Law of Conservation of Charge? A. the total charge in a system is not constant B. charges cannot be created nor destroyed, but can be transferred from one material to another C. the total charge in a system must remain constant D. B and C 308. If you comb your hair and the comb becomes positively charged, what will happen to your hair? A. it will be repelled by the comb B. it will remain uncharged C. it will become positively charged D. it will become negatively charged 309. Which of the following can be attr acted by a positively charges object? A. another positively charges object B. any other object C. a neutral object D. no other object 310. Atoms are the building blocks of matter and that the material objects are made up of atoms and combination of atoms. Its presence provides electrical property. What type of charging process happens when you rub two objects. A. charging by induction B. charging by convection C. charging by conduction D. charging by friction 311. When you pulled the tape vigorously from the table, some of the electrons from the table’s surface were transferred to the tape. This means that the table has lost some electrons so it has become… A. negatively charged B. positively charged C. neutral D. negative and positively charge
►
explains the importance of earthing or grounding
312. A charged object is brought near a metal ball that is mounted on a rubber sheet. If the metal ball acquired a negative charge of the object that was brought near it? A. positive B. negative C. neutral D. Cannot determine from the given information alone 313. Which of the following reasons explain why grounding is important for electrical devices like refrigerator? A. to neutralize the refrigerator B. to save electricity C. to hasten the frosting process D. to make the refrigerator artistic 314. The process of removing excess charges on an object. A. discharging B. lightning C. grounding D. polarization
315. Any object that can serve as an “unlimited” source of electrons so that it will be capable of removing or transferring electrons from or to a charged object in order to neutralize that object. A. ground B. discharge
C. neutralize D. charge
316. A charged object is brought near a metal ball that is mounted on a rubber sheet. If the metal ball acquired a negative charge after it was grounded momentarily, what must be the charge of the object that was brought near it? A. neutral B. positive C. negative D. Cannot determine from the given information alone 317. Te following are importance of grounding or ear thing in the electrical system EXCEPT… A. provides a low resistance path to ground for any surges or lightning strikes that may occur B. provides a low resistance path to ground fir fault currents C. prevent the build-up of excess c harges from the system D. keeps the electrical system fluctuate and malfunction 318. A negatively charged rod is brought near a metal can that rests on a wooden box. You touch the opposite side of the can momentarily with your finger. If you remove your finger before removing the rod, what will happen to t he can? A. It will be discharged B. Its charge will remain as it was C. It will become positively charged D. It will become negatively charged 319. Why is grounding important? A. it let electron attracted to the earth B. it attracts charges from the ground C. it retains the property of the charged body D. it allows electrons to flow in any direction 320. Why is the process of grounding important? A. grounding is necessary in electrical devices and equipment since it can prevent the build-up of excess charges w here it is not needed B. grounding collects electricity needed to light a bulb. C. A and B D. none of these 321. A charged object is brought near a metal ball that is mounted on a rubber sheet. If the metal ball acquired a negative charge after it was grounded momentarily, what must be the charge of the object that was brought near it? A. B.
neutral positive
C. negative D. cannot be determined from the given information
322. It is necessary in an electrical equipment and devices since it can prevent the buildup of excess charges where is not needed. A. grounding B. charging C. polarization D. none of the above
323. It is the process of removing excess charge on an object by means of transmitter of electrons between it and another object. A. electrolysis B. grounding C. charging D. conducting 324. A ground can be any object that serves as an “unlimited” source of electrons so that it will be able to remove or transfer electrons from or to a charged object in order to neutralize that object. That process may be referred as… A. charging B. electricity C. induction D. grounding ►
describes how a lightning rod works
325. A positively charged rod is brought near a metal can that rests on a wooden box. You touch the opposite side of the can momentarily with your finger. If you remove your finger before removing the rod, what will happen to t he can? A. It will be discharged B. Its charge will remain as it was C. It will become positively charged D. It will become negatively charged 326. Lightning rods are placed at the top of a structure and must also be ground, why? A. when lightning strike the rod it will hit the building or structure B. lightning rods are not advisable to use because it attracts lightning C. when lightning strikes the rods, the charges pass safety to the ground D. lightning rods are non-conductors so it won’t attract lightning 327. Which of the following is CORRECT? A. flat iron – thermal energy to electrical energy B. electric fan – electrical energy to mechanical energy C. washing machine – mechanical energy to electrical energy D. flashlight – light energy to electrical energy 328. A negatively charged rod is brought near a metal can that rests on a wooden box. You touch the opposite side of the can momentarily with your finger. If you remove your finger before removing the rod, what will happen to t he can? A. It will be discharged B. Its charge will remain as it was C. It will become positively charged D. It will become negatively charged 329. Lighting occurs when the region of ___________________ comes close to the positive are of the earth. A. cloud C. land B. sky D. all of these 330. A negatively charged rod is brought near a metal can that rests on a wooden box. You touch the opposite side of the can momentarily with your finger. If you remove your finger before removing the rod, what will happen to t he can? A. It will be discharged B. Its charge will remain as it was C. It will become positively charged D. It will become negatively charged
