3.4 Review

1. The force of the gravitational attraction between two objects depends on their masses and _____.

2. Why does a ball eventually hit the ground after you throw it?

Because air resistance slows it down until it hits the ground.
Because Earth's gravity pulls the ball towards the center of the Earth, and the ball is not traveling fast enough to avoid hitting the ground.
Because all moving objects must eventually come to a halt according to Newton's laws of motion.
Because gravity of the ball pulls the surface of the Earth up to meet it.
Because what goes up must always come down.

3. Could Superman potentially “throw” a ball into orbit?

4. True or False?
People can only experience weightlessness in space

5. Why can astronauts go so much farther with a “bunny-hop” on the Moon, compared to Earth?

6. Small objects in space, like asteroids, can be potato-shaped, while bigger objects like moons, planets and stars are round because ________

Small objects don’t have enough mass for gravity to overcome the strength of their rock and make them round.
Small objects are all the shattered remains of larger objects.
The laws of gravity only apply to large objects, not small objects like asteroids.
Gravity can only affect gas and liquid, not rock.

7. The fact that Saturn orbits the Sun more slowly than Earth is a consequence of the fact that:

Earth & Space Science