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Gravity and Inertia Review

Total questions: 25

Worksheet time: 17mins

Name
Class
Date
1.

Larger masses have a

a)

weaker gravitational force

b)

stronger gravitational force

c)

equal gravitational force

2.

Holds the Earth and other planets in orbit around the Sun.

a)

The Sun's gravitational force

b)

The moon's gravitational force

c)

The Earth's gravitational force

d)

The lack of gravitational force

3.
Because of inertia, a moving object will keep ________.
a)
at rest
b)
moving
c)
in one spot
d)
inertia 
4.
Because of inertia, a resting object will remain at ________.
a)
rest
b)
a constant speed
c)
school
d)
inertia 
5.
Objects with greater _________ also have greater inertia.
a)
speed
b)
mass
c)
temperature
d)
friction
6.

What two forces affect gravity?

a)

mass and inertia

b)

mass and distance

c)

mass and force

d)

mass and weight

7.
Why do all of the planets orbit the sun rather than Earth?
a)
the sun has more mass
b)
the sun is a star
c)
the Earth is heavier
d)
the sun is in the middle of the milky way
8.

When Sean was riding his bike and braked suddenly, he kept moving forward due to

a)

gravity

b)

friction

c)

inertia

d)

weight

9.
This force attracts all objects toward each other.
a)
Newton
b)
gravity
c)
weight
d)
path
10.
As distance between two objects increase, the pull of gravity 
a)
Increases
b)
Decreases
c)
Stays the same
11.
What would happen to the planets in the solar system if the sun’s gravitational force were to suddenly disappear?
a)
They will stop moving and become static.
b)
They will stop spinning.
c)
They will fly away in straight lines.
d)
They will start moving toward the Sun
12.

Objects with more mass are..

a)

harder to speed up or slow down

b)

easier to speed up or slow down

13.
Gravity on the moon is about 1/6 the gravity felt on the earth. This is because
a)
the moon is much less massive than the earth
b)
the earth has a molten core and the moon doesn't
c)
the moon is so much further from the sun than the earth.
d)
the moon is so far away from the earth
14.
Gravity attracts all objects towards one another.
a)
False
b)
True
c)
It depends
15.
the tendency of an object to resist a change in its motion
a)
acceleration
b)
inertia
c)
mass
d)
frame of reference
16.
Every object in the universe attracts every other object.
a)
True
b)
False
17.
What is gravity?
a)
A resistance to change. 
b)
A force that attracts and repels objects.
c)
A force that pulls objects "in" or together.
d)
A force that causes objects in motion to stay in motion. 
18.
Which of the following is an example of inertia?
a)
Slamming on the breaks in your car and flying forward.
b)
An apple falling off of a tree. 
c)
Running at a cross country event. 
19.

Inertia tells us that we need ____________ to get an object moving or to make it stop.

a)

a force

b)

gravity

c)

friction

d)

strength

20.
True of False?
An object's inertia is effected by its mass.
a)
False
b)
True
21.

Inertia is the tendency of an object to resist a change in its ___________.

a)

temperature

b)

shape

c)

size

d)

motion

22.

Gravity or Inertia: A skydiver jumps out of a plane and falls downward toward the ground.

a)

Gravity

b)

Inertia

23.

Gravity or Inertia: An meteoroid that gets too close to Earth will get pulled into its atmosphere and crash.

a)

Gravity

b)

Inertia

24.

Gravity or Inertia: An ice skater keeps gliding foward until he hits the wall.

a)

Gravity

b)

Inertia

25.

Gravity or Inertia: You try to push on a broken-down car, but it doesn't move at all.

a)

Gravity

b)

Inertia

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