Answers2627 EARTH SPACE SCIENCE AGravity and Motion

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 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.
3

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
4

Which statement describes a newton?

A
It exists only for objects on Earth.
B
It measures the mass of an object.
C
It reflects the amount of force an object exerts.
D
It states that every object attracts another object.
5

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.
6

Which statement describes Newton’s law of universal gravitation?

A
Mass has little effect on gravity between objects.
B
Gravity pushes objects away from Earth’s center.
C
Gravity does not act between Earth and the moon.
D
Every object in the universe attracts every other object.
7

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.
8

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
9

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.
10

Which statement describes how Earth compares to the moon?

A
Earth has more inertia than the moon.
B
The moon has more gravitational pull than Earth.
C
The moon rotates at a constant speed while Earth’s speed varies.
D
Earth and the moon will not change their motion when acted on by a force.

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