Planets Answers

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3

Which factors determine how much gravity a body in the universe possesses? Check all that apply.

A
inertia
B
mass
C
weight
D
distance
E
orbital motion
4

Which force helps keep Earth in orbit?

A
Earth’s gravity
B
the moon’s inertia
C
the Sun’s gravity
D
the Sun’s inertia
5

In a far-off galaxy, an astronomer observes a moon orbiting a planet. The moon stays in orbit because of the planet’s gravity.Which scenario would increase the gravity of the planet?

A
decreasing the distance between the moon and the planet
B
increasing the distance between the moon and planet
C
increasing the planet’s inertia
D
increasing the moon’s inertia
6

An object’s will remain constant throughout the universe, but its can change from planet to planet. If you increase the mass of a planet, what happens to its gravity? If the gravity on a planet decreases, what happens to the weight of an object on that planet?

Answers:
An object’s will remain constant throughout the universe, but its can change from planet to planet.:mass
An object’s will remain constant throughout the universe, but its can change from planet to planet.:weight
If you increase the mass of a planet, what happens to its gravity?:strength of gravity increases
If the gravity on a planet decreases, what happens to the weight of an object on that planet?:weight decreases
7

mass✔ weight

A
mass
B
weight
8

✔ strength of gravity increasesstrength of gravity decreasesstrength of gravity stops completely

A
strength of gravity increases
B
strength of gravity decreases
C
strength of gravity stops completely
9

weight increases✔ weight decreasesweight stays the same

A
weight increases
B
weight decreases
C
weight stays the same
15

Fredo’s spaceship takes him to the very edge of known space. There, gravity has no effect at all. Fredo takes a baseball and tosses it into space. What will most likely happen to the ball?

A
It will not move at all.
B
It will return to Fredo’s spaceship.
C
It will eventually stop moving.
D
It will continue moving in a straight line.
17

1 2 ✔ 3

Answer not available
18

1 ✔ 23

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