Friction
Forces
Magnets
Gravity
100

This term means "a force that acts between two objects that are in contact with one another. It slows or stops movement between the two surfaces that are touching." 

Friction

100

True or False:

You need a push force to move a shopping cart? 

True

100

What two poles of a magnet would attract each other?

North and South

100

What force causes an apple to fall from a tree?

Gravity

200

Give an example of something with high friction.

Many possible answers. (Sandpaper, grass, carpet)

200

What do you need to move an object?

A push or a pull.

200

True or false: when magnets repel each other, they come together.

False. 

200

What is gravity?

the force that pulls everything to the center of the Earth. 

300

This type of surface creates the least amount of friction.

A smooth surface.

300

_________________ forces happen when two objects touch each other. 

Contact forces.

300

The word "attract" means... 

To pull towards itself. In this case, when two magnets are pulled together. 

300

Is gravity a pushing or a pulling force? Explain. 

Gravity is a pulling force.

400

What could you do if you want to go down a slide faster?

Many possible answers.

400

Which object takes more force to move? A rock or a ball of paper? WHY?

A rock takes more force to move, because it is heavier so you would need to exert more force to move it.

400

Identify two materials that are magnetic.


Many possible answers: paperclips, scissors, nails.


400

Gravity is an example of an ________ ___ _ ______ force. 

Action at a distance force

500

How could you increase friction on an icy hill?

Many possible answers.

500

______________________ says that an object in motion _____________________________________ and an object at rest __________________________ ___________________________________________. 

Sir Isaac Newton 

stays in motion unless another force acts upon it,

stays at rest unless another force acts upon it.

500

Objects that are magnetic objects are usually made of...

iron or steel. 

500

Who discovered gravity?

Isaac Newton

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