Gravity Galaxy

Task 3: Forces and Motion

Lesson Review Quiz

Gravity and Motion

MS-ESS1-2: Develop and use a model to describe the role of gravity in the motions within galaxies and the solar system.

Learning Targets

• I can create a model showing how gravity works in the solar system.

• I can describe the role of gravity in the solar system.

Multiple Choice

REVIEW!

What is weight?

• Gravity acting on something with mass

• How heavy something is

• The thing you do in line at Disneyland

Multiple Choice

Mass is...

• the amount of matter in an object

• the weight of an object

• measure of the force of gravity

Gravity and Gravitational Attraction

• Gravity: Force that attracts all objects toward each other.

• Force of gravity (between two objects) is affected by the masses of the objects and the distance between them.

Multiple Choice

Why does a baseball continue to move after a pitcher lets go of it and stops applying force?

• The ball has speed.

• The ball has inertia.

• The ball has gravity.

• The ball has friction.

Inertia

• Inertia: The tendency of an object to resist a change in motion.

• An object with more mass has more inertia.

• Objects with more inertia are harder to move and stop.

• Newton's First Law: An object at rest will stay at rest, an object in motion will stay in motion unless acted on by a force.

Orbital Motion

• Gravity and Inertia work to keep the moon in orbit around Earth.

• Without gravity and inertia the moon would travel in a straight line.

Multiple Choice

Orbital motion is a combination of which 2 motions

• frictional resistance and spinning

• free fall and forward motion

• horizontal acceleration and friction

• weightlessness and free fall

Multiple Choice

Gravity ...

• repels all objects away from each other

• attracts all objects towards each other

• is the amount of matter in an object

Multiple Choice

The strength of the force of gravity depends on ...

• distance between the two objects

• mass of the two objects

• mass of objects and distance between them

Multiple Choice

As objects get farther apart their gravitational force

• stays the same

• increases

• decreases

Multiple Choice

You weigh ___________ on the moon.

• the same

• more

• less

Multiple Choice

The force that attracts all objects toward each other is called

• motion

• inertia

• gravity

• magnetism

Multiple Choice

When an object travels around another object in space, we call this

• terminal velocity

• projectile motion

• orbit

• rocket science

Multiple Choice

this occurs when only gravity is acting on an object

• terminal velocity

• free fall

• projectile motion

• air resistance

Multiple Choice

If a feather and a hammer are dropped at the same time which one will hit the ground first?

• it can be one or the other depending on how fast they fall

• hammer because it has more mass

• feather because it has less mass

• both will hit at the same time

Multiple Choice

The more mass 2 objects have the __________ the gravitational pull

• stronger

• weaker

Multiple Choice

All objects on Earth fall at the same rate once air resistance and other factors are removed

• true

• false

Multiple Choice

All matter is affected by gravity because all matter has

• volume

• energy

• mass

• motion

Multiple Choice

Gravity makes large objects into this shape

• sphere

• cube

• cylinder

• pyramid

Multiple Select

What would increase the force of gravity between two objects?

• Increase in mass

• Decrease in distance

• Decrease in mass

• Increase in distance