1. Lots of fun! Win valuable prizes!
The Gravity Game
Lots of fun!
Win valuable prizes!

2. 1. Why did Newton think there was a force acting on the moon?
Because the moon is moving
Because there is no air on the moon
Because the moon moves in a curved path
Because the moon always keeps one side toward Earth
all of the above

3. If the mass of Earth decreased, with no change in radius, your weight would
stay the same.
decrease.
increase also.

4. The gravitational force between two massive spheres
depends inversely on the square of the distances between them.
is always an attraction.
depends on how massive they are.
all of the above

5. Two objects move away from each other
Two objects move away from each other. As the objects get farther and farther apart, the force between them
remains constant.
decreases.
increases.

6. Suppose the gravitational force between two asteroids separated by a certain distance is 100 N. The asteroids then move apart so they are separated by twice the original distance. What is the force between them now?
400 N
200 N
100 N
50 N
25 N

7. Where are high tides on Earth located?
On the oceans closest to the sun and farthest from the sun
Only on the oceans closest to the moon
Only on the oceans closest to the sun
On the oceans closest to the moon and farthest from the moon

8. Some stars expand until their mass becomes so great that only light can escape. Such a star becomes a black hole. True False

9. If the sun were to collapse to form a black hole, Earth would
leave the solar system in the direction of its tangential velocity
immediately disappear
spiral into the black hole
be drawn into the black hole
orbit the black hole just as it orbits the sun now

10. When a star collapses to form a black hole, its mass
decreases
increases
remains the same