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