Force and Motion

Force and Motion 3rd Grade

​Vocabulary:
Force
Motion
Friction
Gravity
Repel
Attract

What is a FORCE?

• a push or a pull

• force can change the motion of an object

• force can change the position of an object

• force can change the shape of an object

What is MOTION?

Motion is the act, process, or result of changing the position of an object from one place to another.

What is FRICTION?

• a force that occurs when two objects touch or rub against each other

• a force of resistance that slows down or stops a moving object

• a force that creates heat

• a force that opposes motion (goes the opposite direction)

What is GRAVITY?

• a force that pulls all objects towards the Earth

• a force that acts on an object without the need for another object to touch it

Gravity is an invisible force that pulls two objects toward each other. Earth's gravity is what keeps you on the ground and what makes things fall.

​

Gravity

Multiple Choice

Can force change the direction of a moving object?

• YES

• NO

Multiple Choice

Can force CHANGE the shape of an object?

• YES

• NO

Multiple Choice

Which force occurs between two objects that touch each other and creates heat?

• gravity

• friction

• push

• pull

Multiple Choice

________ is kind of force that pulls all objects towards the earth.

• friction

• motion

• gravity

• mass

Multiple Choice

The act, process, or result of changing the position of an object through movement is called ________.

• friction

• gravity

• force

• motion

Multiple Choice

A ball is moving down the hill towards you but then your friend kicked the ball away from you. This resulted to a _________.

• change in direction

• change in shape

• change in size

• change in color

Multiple Choice

Gravity is an ________________.

• invisible force that pulls two objects down toward the ground.

• repel and attract forces.

Multiple Choice

The rougher the surface the _______ friction there is. The smoother the surface, the _______friction there is.

• less....more

• more....less

• balanced...unbalanced

What are balanced forces?

https://www.youtube.com/watch?v=tS8w-CXJehk

What are unbalanced forces?

Multiple Choice

An object at rest will remain at rest and an object in motion will remain in motion UNTIL this force is applied.

• balanced forces

• unbalanced forces

• gravity

• friction

Multiple Choice

Balanced forces are equal forces in _________directions.

• same

• opposite

Multiple Choice

In a tug-of-war, why would a team win?

• when there is balanced force between the two teams

• when one team applies more force thus creating an unbalanced force

• when there is more gravitational pull between the team

Magnetism is a non-contact force, like gravity. Magnetism is the invisible force that pulls pm some metal objects. Magnet is a material that produces a magnetic field. A magnetic field is an invisible force that attracts or repels some materials.

Magnetism

Multiple Choice

Does every object have magnetic field?

• No
• Yes

Multiple Choice

What is magnetism?

• Magnetism is a type of weather phenomenon.
• Magnetism is a force that attracts or repels certain materials, such as iron or steel.

Multiple Choice

A north pole and a south pole will attract.

• No

• Yes

Multiple Choice

A south pole and a south pole will repel.

• Yes

• No