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100
Objects need a __________________ to move.
force
100
A force is a _____________ or a _____________.
push or pull
100
A pull can change the __________________ of something, such as a post.
position
100
When something moves it is in __________________.
motion
100
When you use _______________ force to kick a ball it will go farther.
more
200
Lighter objects need _________________ force to move.
less
200
_______________ pulls objects to the center of the Earth.
Gravity
200
Gravity is a _______________ force.
pulling
200
Gravity pulls objects down unless a _____________ holds them up.
solid
200
Gravity pulls objects through ___________ and ______________.
air and liquid
300
Magnets are attracted to objects made of ___________.
metal
300
A magnet has two ______________.
poles
300
The names of the poles are _____________ and _____________.
north and south
300
A magnets force is ______________ at its poles.
strongest
300
Opposite poles such as north and south will ____________.
attract
400
Two poles that are alike such as north and north will ________________.
repel
400
Attract means to ____________ toward.
pull
400
Repel means to _______________ away.
push
400
Magnets can pull objects through ____________, _______________, and _______________.
air, liquid, and solid
400
_______________ will slow down or stop something.
Friction