AnswersFL-2001320-EarthSpace Science Honors ASpace Technology

Gravity and Motion Answers

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According to Newton’s first law, which characteristic of a moving object would remain constant if there were no other forces acting on it?

A
size
B
mass
C
shape
D
speed
2
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Which statement describes gravity?

A
There is no defined unit of measurement for gravity.
B
Gravity is the force that pulls objects toward Earth’s center.
C
Objects that have a small mass will have no gravitational pull.
D
Gravitational pull between two objects decreases as the mass of one increases.
3

Which statement explains how weight is different from mass?

A
Mass is a varying property.
B
Mass is measured in newtons.
C
Weight is always greater than mass.
D
Weight is a measure of gravitational pull.
4

A student is asked to describe the path of a paper airplane that is thrown in the classroom.Which statement best describes the path of the paper airplane?

A
The paper airplane will move in a straight line, according to Newton’s first law of motion.
B
The paper airplane will drop straight to the ground once its inertia gives in to the force of gravity.
C
The paper airplane will create a curved path toward the floor as it is pulled toward Earth’s center.
D
The paper airplane will orbit around the desk because it is the object with the largest mass in the room.
5

The diagram shows the moon and Earth in space.

Question illustration
A
force of Earth’s gravity
B
moon’s attraction to the Sun
C
moon’s motion without gravity
D
orbit of the moon around Earth
6

Which statement best explains why objects are pulled toward Earth’s center?

A
Earth has a magnetic force that is strongest at its core.
B
Earth has a much greater mass than objects on its surface.
C
The weight of the atmosphere pushes objects toward Earth's surface.
D
The strength of the Sun’s gravity pushes down on objects at Earth's surface.
7

Which of the moon’s properties prevents it from being pulled inward by Earth?

A
gravity
B
inertia
C
shape
D
structure
8

Which statement explains how gravity and inertia work together?

A
They change the motion of objects.
B
They take turns working on objects.
C
They keep all objects moving at the same speed.
D
They prevent objects from moving in a circular motion.
9

Which action results from the combination of gravity and inertia working on the moon?

A
the moon’s orbit around Earth
B
Earth’s downward pull on the moon
C
the moon’s push against other planets
D
Earth’s gravitational pull toward the moon
10

Which pair of factors affects the force of gravity between objects?

A
direction and distance
B
mass and distance
C
mass and shape
D
shape and time

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