Worksheets8th Grade Science Review 15 (Gravity)
Total questions: 9
Worksheet time: 5mins
Name
Class
Date
1.
Which of the following planets takes the longest time to complete one revolution of the sun?
MVEMJSUN
MVEMJSUN
a)
Earth
b)
Venus
c)
Mercury
d)
Jupiter
2.
Which of the following statements about the gases in Earth’s atmosphere is true?
a)
The gases in the atmosphere are nonreactive.
b)
Most of the ozone in the atmosphere is located in the photosphere.
c)
78% of Earth’s atmosphere is nitrogen, 21% is oxygen, and the rest
is other gases.
d)
Oxygen was one of the gases in Earth’s very early atmosphere.
3.
A student swings a ball attached to a string to model the moon’s orbit around the Earth. What force does the string represent?
a)
inertia
b)
pressure
c)
gravity
d)
momentum
4.
If there were no gravitational forces acting on the moon, the moon would
a)
quickly crash into the Earth.
b)
continue at a constant speed in a straight line through space.
c)
still orbit Earth as it does now.
d)
remain stationary, at a fixed distance from Earth.
5.
Why don’t you notice the gravitational pull of objects towards you or your body towards objects, such as a pencil?
a)
The force of gravity influences only objects that are very close together.
b)
You don’t notice the pull because Earth’s pull is greater.
c)
Small objects exert no gravitational force.
d)
The mass is too small to ca use a force large enough to notice.
6.
Which of the following statements explains the Law of Universal Gravitation?
a)
Objectsintheuniverseattracteachotherthroughgravitationalforce,
depending on their weights and the distance between them.
b)
Objectsintheuniverseattracteachotherthroughfrictionalforce,based
on friction and the distance of their masses.
c)
Objects in the universe attract each other through gravitational force,
depending on their masses and distance between the objects.
d)
Objectsintheuniverseattracteachotherthroughmotivationalforces,
depending on their weights and masses.
7.
What is the measure of gravitational force on an object?
a)
friction
b)
weight
c)
balance
d)
mass
8.
How does mass affect gravitational force?
a)
Gravitational force decreases as the masses of the objects increase.
b)
Gravitational force increases as the masses of the objects increase.
c)
Gravitational force increases as the masses of the objects decrease.
d)
Gravitational force between objects does not dependon their masses.
9.
What force prevents the moon from moving away from Earth?
a)
tides
b)
inertia
c)
electromagnetism
d)
gravity
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