Question 1. In science, every theory must be tested by using it to make:
A. a hypothesis.
B. laws of nature.
C. experiments.
D. a mathematical formula.
Question 2. Which of the following is not part of the scientific method?
A. identifying patterns
B. prediction
C. observations
D. belief
Question 3. Which of these statements is not true about Copernicus?
A. He hypothesized that planetary orbits were circular.
B. He thought that Ptolemy's ideas about the shape of orbits were correct.
C. His model of the universe placed the Sun, rather than the Earth, at the center.
D. He used telescopic observations to confirm his theories.
Question 4. What is the acceleration of a car that reaches a speed of 3 meters per second from rest in ten seconds?
A. 3 meters per second
B. 0.15 meter per second
C. 0.3 meters per second squared
D. 30 m/s2
Question 5. When Galileo rolled a ball down an incline and up another incline, he found that the ball rolled nearly to
A. its initial height.
B. halfway its original height.
C. three quarters its original height.
D. higher than its original height.
Question 6. Does the speedometer on a vehicle show average speed or instantaneous speed?
A. A speedometer shows average speed.
B. A speedometer shows instantaneous speed.
Question 7. An object is at rest. The forces acting on the object _______.
A. have a vector sum of zero
B. are opposite in direction
C. are equal in magnitude
D. are all of the above
Question 8. Knowledge can be gained by philosophical logic and also by experimentation. Which of these did Aristotle favor, and which did Galileo favor?
A. Aristotle and Galileo both favored logic.
B. Aristotle favored experiment; Galileo favored logic.
C. Aristotle and Galileo both favored experiment.
D. Aristotle favored logic; Galileo favored experiment.
Question 9. One-half second after starting from rest, a freely falling object will have a speed of about
A. 5 m/s.
B. 15 m/s.
C. 10 m/s.
D. none of the above
Question 10. A stone is dropped off a cliff and is in free fall. Every second that the stone is falling, its acceleration _______.
A. and its speed are constant
B. is decreasing
C. is constant but its velocity is increasing
D. is increasing