1. CRCT Preparation

2. A. 1 kilogram and 1 kilogram B. 1 kilogram and 2 kilograms
Four pairs of objects have the masses shown below. If the objects in each pair are the same distance apart, the gravitational force between the objects in which pair is greatest?
A. 1 kilogram and 1 kilogram
B. 1 kilogram and 2 kilograms
C. 2 kilograms and 1 kilogram
D. 2 kilograms and 2 kilograms

3. In the absence of air resistance, which of these objects will fall at the fastest rate when dropped?
A. the ball with a mass of 75 kg
B. the ball with a mass of 25 kg
C. the ball with a mass of 10 kg
D. They all fall at the same rate.

4. Satellites stay in place as they orbit because of
A. the repeated firing of rocket boosters.
B. the gravitational pull of Earth.
C. a narrow path through the vacuum of space.
D. solar panels generating energy to hold them in place.

5. On Earth, an astronaut has a mass of 140 kg
On Earth, an astronaut has a mass of 140 kg. When the astronaut goes into space, she
A. will have a mass of 140 kg, but will have less weight.
B. will have less mass and weight.
C. will have a mass of 140 kg, and have a weight of 140 kg.
D. will have less mass and a weight of 140 kg.

6. A. density. B. time. C. velocity. D. weight.
The gravitational force with which Earth attracts a body is measured as
A. density.
B. time.
C. velocity.
D. weight.

7. The space shuttle uses booster rockets for its launch, but does not need them for the rest of its journey. This is because the booster rockets
A. direct the shuttle onto its correct orbital path.
B. reduce the amount of fuel needed for the launch.
C. allow the shuttle to overcome the pull of gravity.
D. protect the shuttle from damage during the launch.

8. As an astronaut travels from Earth to a space station orbiting Earth, what happens to her mass and weight?
A. Her mass decreases, but her weight remains the same.
B. Her mass increases as her weight decreases.
C. Her mass remains the same, but her weight decreases.
D. Her mass decreases and her weight also decreases.

9. The force that holds you to Earth's surface is
A. gravity.
B. weight.
C. mass.
D. pressure.

10. Which is true about friction and gravity?
A. Both are forces.
B. Both cause energy loss.
C. Both cause things to speed up.
D. Both cause heat.

11. A. Rocket engines can force objects into space.
Which is a result of the effect of gravity?
A. Rocket engines can force objects into space.
B. Air friction causes falling objects to slow down.
C. Released objects always fall toward Earth's surface.
D. Airplanes are able to fly without falling to the ground.