1
Class 8 CLASS
SOF - NATIONAL SCIENCE OLYMPIAD
SAMPLE PAPER
Total Questions : 50
8
Time : 1 hr.
LEVEL-II Guidelines for the Candidate 1. You will get additional ten minutes to fill up information about yourself on the Answer Sheet, before the start of the exam. 2. The Question Paper comprises three sections: Mental Ability (15 Questions), Science (30 Questions) and Achievers Section (5 Questions) Each question in Achievers Section carries 3 marks each, whereas all other questions carry one mark each. 3. All questions are compulsory.There is no negative marking. Use of calculator is not permitted. 4. Write your Name, Roll No. and Class clearly on the Answer Sheet and do not forget to sign it. 5. There is only ONE correct answer. Choose only ONE option for an answer. 6. To mark your choice of answers by darkening the circles in the Answer Sheet, use an HB Pencil or a Blue / Black ball point pen only. E.g. Q.16: In the water cycle, condensation is the process of A. Water vapour cooling down and turning into a liquid B. Ice warming up and turning into a liquid C. Liquid cooling down and turning into ice D. Liquid warming up and turning into water vapour As the correct answer is option A, you must darken the circle corresponding to option A in the Answer Sheet. 7. Rough work should be done in the blank space provided in the booklet. 8. Return the Answer Sheet to the invigilator at the end of the exam. 9. Write your Roll No. on the Question Paper too and take it home for future reference.
SYLLABUS Section – I (Mental Ability) : Rational Numbers, Operation on Rational Numbers, Decimal Representation of Rational Numbers, Exponents and Powers, Direct and Inverse Variations, Comparing Quantities, Algebraic Expression, Factorization of Algebraic Expressions, Linear Equation in One Variable, More About Triangles, Congruent Triangles, Quadrilaterals, Circles, Mensuration, Statistics, Arithmetic Ability, Squares and Square Roots, Cubes and Cube Roots, Problem Based on Figures, Find Odd Numeral Out, Series Completion, Coding-Decoding, Mathematical Reasoning, Analytical Reasoning, Mirror Images, Embedded Figures. Section – II (Science) : Crop Production and Management, Microorganisms, Synthetic Fibres and Plastics, Metals and Non-metals, Coal and Petroleum, Combustion and Flame, Conservation of Plants and Animals, Cell, Reproduction in Animals, Force and Pressure, Friction, Sound, Chemical Effects of Electric Current, Some Natural Phenomena, Light, Stars and Solar System, Pollution of Air and Water.
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Class 8
MENTAL ABILITY 1.
Which of the following is the highest value? (A) 12 9 (B) 10 11
2.
(C) 11 10
(D) All are same
A square and a rectangle each has a perimeter of 48 m. The difference between the areas of two figures is 4 m 2 . The dimensions of the rectangle are ________ . (A) 20 m, 4 m
(B) 18 m, 6 m
If a x = b y = c z = abc, then
3.
(A) –1 4.
(C) 14 m, 10 m
(D) 16 m, 8 m
(C) 1
(D)
1 1 1 + + = x y z
(B) xyz
1 xyz
y
Reflect the figure across the yaxis.
x¢
Which is most likely the new figure?
7 6 5 4 3 2 1 7 6 5 4 3 2 1 1 2 3 4 5 6 7 1 2 3 4 5 6 7
x
y¢
x¢
5.
y
y
y
y
7 6 5 4 3 2 1
7 6 5 4 3 2 1
7 6 5 4 3 2 1
7 6 5 4 3 2 1
7 6 5 4 3 2 1 1 2 3 4 5 6 7 1 2 3 4 5 6 7
x x¢
7 6 5 4 3 2 1 1 2 3 4 5 6 7 1 2 3 4 5 6 7
x
x¢
7 6 5 4 3 2 1 1 2 3 4 5 6 7 1 2 3 4 5 6 7
x x¢
7 6 5 4 3 2 1 1 2 3 4 5 6 7 1 2 3 4 5 6 7
y¢
y¢
y¢
y¢
(A)
(B)
(C)
(D)
In the diagram, MN and KL are straight lines. Which point among P, Q, R, S lies on both perpendicular bisectors of MN and KL?
x
K
M R
(A) P
P
(B) Q
S N
Q
(C) R (D) S
L
6.
Five friends are standing in a row facing South. Aman is standing to right of Deva, Chandan is in between Deva and Ekta. Bobby is standing extreme right. Who is standing exactly in the middle ? (A) Aman (B) Chandan (C) Deva (D) Ekta
7.
Vipul added a support to his metal shelves. If ÐSMO measures 45°, what is the measure of ÐSTN? (A) 135° (B) 180°
S
W M N
O
(C) 45° (D) 90°
T
P
3 8.
Class 8
Which statement about the volume of the two pyramids shown below is true? (Volume = Area of base × height)
6 cm
5 cm
(A) The volumes of Pyramid II and Pyramid I are the same. (B) The volume of Pyramid II is 10 times the volume of Pyramid I. (C) Pyramid II has 10 cubic cms more volume than Pyramid I. 6 cm Pyramid I
(D) Pyramid II has 30 cubic cms more volume than Pyramid I. 9.
5 cm
4 cm 5 cm Pyramid II
This is a standard set of dominoes. The dominoes are turned over and shuffled thoroughly and one is selected randomly. What is the probability that the total number of spots shown in the one chosen will be greater than 6? 11 4 (A) (B) 28 9 3 2 (C) (D) 7 7 1 2x+ 2
10. If ( 3 4 )
(A) –2
=
1 , then x = 32 (B) 4
(C) –6
(D) –4
SCIENCE 11. Ali wants to conduct an experiment to show how friction can be reduced by applying different lubricants. An experiment is set up as shown below. Which of the following must be kept constant toy car in order for the experiment to be fair? (i) Type of ramp used
(ii) Type of car used
(iii) Location of the experiment
(iv) Position of the car
(v) Amount of lubricant
(vi) Type of lubricant
(A) (i), (ii), (v) and (vi) only (B) (i), (ii) and (iv) only
(C) (ii), (iii) and, (v) only (D) (i), (ii), (iv) and (v) only
12. One cannot see through fog because (A) Fog absorbs light (C) Light suffers total reflection on the droplets in fog
ramp
(B) The refractive index of fog is infinity (D) Light is scattered by the droplets in fog
13. StatementI : A plane mirror produces virtual, erect image of the object. StatementII : Plane mirror has finite focal length. (A) Both Statements I and II are true and Statement II is correct explanation for Statement I. (B) Both Statements I and II are true but Statement II is not a correct explanation for Statement I. (C) Statement I is true and Statement II is false. (D) Statement I is false and Statement II is true. 14. If a body is allowed to fall freely from a height, its speed increases continuously. It is because (A) Air does not exert frictional force (B) Magnetic force of earth increases its speed (C) Gravitational force of earth increases its speed (D) Pressure of air forces it downward 15. X and Y can be X (A) Polythene (B) PVC (C) PVC (D) Melamine
Y Bakelite Polythene Melamine PVC
Plastics
Thermosetting
Thermoplastics
X
Y
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Class 8
Zone I
16. Zone of partial combustion is
Zone II
(A) Zone I
Zone III
(B) Zone II (C) Zone III (D) All zones give complete combustion 17. P and Q can be respectively (A) Acidic oxide, basic oxide (B) Nonmetallic oxide, Metallic oxide
Oxides Turn blue litmus red
Turn red litmus blue Q
P
(C) SO 2 , MgO (D) All of these 18. Match the following : Column I
Column II
(a) LPG
(i) Nonluminous flame
(b) Outer zone of candle
(ii) Inflammable substance
(c) Alcohol, nylon fibres
(iii) Rapid combustion
(d) Fire crackers
(iv) Spontaneous combustion
(A) (a) (iii), (b) (i), (c) (ii), (d) (iv)
(B) (a) (i), (b) (iii), (c) (ii), (d) (iv)
(C) (a) (iv), (b) (i), (c) (ii), (d) (iii)
(D) (a) (iv), (b) (ii), (c) (i), (d) (iii)
19. Red Data Book is the source book which keeps a record of all the endangered animals and plants. The organization which is responsible for maintaining Red Data Book is (A) IUCN
(B) CITES
(C) WWF
20. In which labelled part of the given figure, development of baby takes place? (A) (i) (B) (ii)
(D) IBWL (i) (ii) (iii) (iv)
(C) (iii) (D) (iv) 21. The part X in the given figure is responsible for (A) Deep voice (B) Change in body shape
X
(C) Produces thyroxine (D) None of these 22. The two chromosomes named X and Y are called sex chromosomes. If Y is being replaced by X in the given figure, then the resulting zygote would Y
develop into (A) A male child
(B) A female child
(C) A child with abnormalities
(D) Either (A) or (C)
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Class 8
0 sewage added
distance downstream
(A) P
0 sewage added
distance downstream
(B) Q
R
0 sewage added
distance downstream
(C) R
number of fish
Q
number of bacteria
P
concentration of oxygen
concentration of nitrogen compounds
23. Which graph shows changes that occur in a river after being polluted by sewage?
0 sewage added
S
distance downstream
(D) S
24. Water which is suitable for drinking is called potable water. It is essential to purify water before drinking. Which of the following methods are used to purify water? (i) Use of a candle type filter (ii) Boiling (iii) Addition of chlorine tablets to water (iv) Addition of bleaching powder to water (A) (i) and (ii)
(B) (i), (ii) and (iii)
(C) (ii) and (iii)
(D) All of these
25. Which of the following statements are correct? (i)
Alexander Fleming in 1929, discovered the antibiotic penicillin
(ii) Edward Jenner in 1876 discovered the bacterium (Bacillus anthracis) which causes anthrax disease (iii) Robert Koch in 1798 discovered the vaccine for small pox (iv) Louis Pasteur in 1857 discovered fermentation (A) (i) and (ii)
(B) (ii) and (iii)
(C) (i) and (iv)
SPACE FOR ROUGH WORK
(D) (i), (ii), (iii) and (iv)
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Class 8
SAMPLE ANSWER SHEET 1. NAME : If your name is SACHIT A IYER, then you should write as follows : S A C H
I
T
A
I
Y E R
2. FATHER'S NAME : If your father's name is SATISH KUMAR SHARMA, then you should write as follows : S A T
I
S H
K U M A R
SCHOOL CODE
M
H
0
5
4
7
A
A B C
1 2
0 1 2
0 1 2
0 1 2
B C D
D
3
3
3
3
E F
E F
4 5
4 5
4 5
G H
G
6 7
6 7
6 7
6
I
I
8
8
8
8
J K
J K
9
9
9
9
L
L M
N
N
O P Q R
O P Q R
S
S
T U
T U
V W
V W
X
X
Y Z
Y Z
S H A R M A
3. SCHOOL CODE Write your school code i.e. if your school code is MH0547 darken as follows :
4. CLASS If you are in Class 10, then you should darken as follows :
5. ROLL NO. If your roll no. is 587, then you should write and darken the circles as follows :
CLASS
1
Darken the circle
5
8
7
1
0 1
0 1
0 1
2
2
2
2
2
3 4
3 4
3 4
3 4
3 4
5 6 7
5 6 7
6 7
5 6 7
5 6
8 9
8 9
8 9
9
0
Darken the circle
6. GENDER If you are a boy, then darken Male circle
ROLL NO.
0
8 9
GENDER MALE
CORRECT way to darken the circle
FEMALE
WR ONG way to darken P × the circle
7. If your choice for Answer 1 is C, then you should darken the circle as follows :
1.
MARK YOUR AN SWERS WITH H B PENC IL/BALL POINT PEN (BLUE/B LACK)
National Science Olympiad 1.
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ANSWERS KEYS 1. 8. 15. 22.
(B) (D) (D) (B)
2. 9. 16. 23.
(C) (C) (B) (A)
3. 10. 17. 24.
(C) (D) (D) (D)
4. 11. 18. 25.
(A) (D) (A) (C)
5. 12. 19.
(B) (D) (A)
6. 13. 20.
(C) (C) (B)
7. 14. 21.
(C) (C) (A)
