Easy Who developed the first reflecting telescope in 1668? A. Isaac Newton
B. Alexander Fleming
C. Karl Jansky
Answer: A. Isaac Newton Newton Reference: Journey Journey Into the World of Science; 2003; p.239
Easy Which of the following parts of the sun is visible only during a total solar eclipse? A. Core
B. Photosphere
C. Sunspots
D. Corona
Answer: D. Corona Reference: Praxis; Praxis; 2011; p. 12; question no.17
Easy Which of the following is most likely involved with controlling levels of sugar in blood? A. Hemoglobin
B. Calcitonin Calciton in
C. Plasma
D. Insulin
Answer: D. Insulin Insulin Reference: Praxis; 2011; p. 11; question no.9
Average According to some scientists, the Earth’s average temperature is rising as a result of the greenhouse effect. An increase in which of the following gases is considered to be primarily responsible?
A. Nitrogen
B. Oxygen
C. Sulfur Dioxide
D. Carbon Dioxide
Answer: D. Carbon Dioxide Dioxide Reference: Praxis; 2011; p. 10; question no.1
Average The agent most widely and most consistently at work changing the appearance of the Earth’s surface is___________.
A. fire
B. volcanism
C. water
D. wind
Answer: C. water Reference: Praxis; 2011; p. 10; question no.7
Average A scientist is trying to track the movement of a rocket. What information does the scientist need to determine the velocity of the rocket? A. the mass and speed of the rocket B. the speed of the rocket and the direction the rocket is moving C. the time the rocket has been traveling and the mass of the rocket D. the time the rocket has been traveling and the direction the rocket is moving Answer: B. the speed of the rocket and the direction the rocket is moving Reference: iLeap Science 6; page 27 Difficult
Paul wanted to investigate the movement of the Sun over the course of a day. He used a sundial to measure the length of a shadow once every hour from sunrise to sunset. Which of the following variables must be kept the same in order to obtain reliable data from this activity? A. Type of sundial and location of sundial B. Length of shadow and location of sundial C. Type of sundial and the times at which measurements are taken D. Length of shadow and the times at which measurements are taken Answer: A. Type of sundial and location of sundial Reference: Released 2010 Achievement Test Science 6; Alberta Dep’t. of Education; page 16 Difficult
Which gas is produced as a result of photosynthesis? Answer: oxygen Reference: Released 2010 Achievement Test Science 6; Alberta Dep’t. of Education; page 37
Difficult
Suppose that the speed of the cyclist is 20 km/h. Calculate the distance he has covered after two hours. Answer: 240 km. Reference: Reference: Journey Into the World of Science; 2003; p.175
