What Makes Things Move?
Gravity/
Magnetism
Simple Machines-
1
Simple Machines-
2
Simple Machines-
3
100
What is a force?
A push or a pull.
100
Gravity ___________ objects toward the center of the Earth.
pulls
100
What is work?
Something done whenever a force moves an object through a distance.
100
Describe what an inclined plane looks like.
It has one end higher than the other, and it has a flat surface.
100
Name something that has a wheel and axle.
Wheelbarrow, doorknob, rollerblades.
200
True or false? An object moves in the direction that it is pushed or pulled.
True
200
True or false? The pull of gravity does not give you weight.
False. The pull of gravity DOES give you weight. Without gravity, everything and everyone would be weightless.
200
True or false? The amount of work you do depends on how much force you apply to move an object.
True
200
Name 2 examples of inclined planes.
wheelchair ramp, path going up a hill, slide
200
What is a gear?
A gear is a wheel with jagged edges like teeth.
300
What is friction?
The force caused by 2 objects rubbing together that slows down or stops moving objects.
300
Magnetism can be a ________ or _________ force.
Magnetism can be a pushing or pulling force.
300
The amount of work you do depends on how _______ you move an object.
far
300
What is the job of a screw?
It is a simple machine used to hold objects together.
300
Where can you find gears?
Watches, clocks, bikes, cars
400
True or false? When rough objects rub together, there is less friction. When smooth objects rub together, there is more friction.
False
400
What are the ends of a bar magnet called?
Poles
400
What is a simple machine? (2 things)
A tool with few or no moving parts that makes work easier.
400
A simple machine made of a wheel and a rope is a ___________.
Pulley
400
A beaver uses its teeth to cut down trees. Its teeth are an example of what kind of simple machine?
A wedge.
500
A force changes the way an object __________.
moves
500
Objects stick to a magnet's poles because...
that is where magnetism is strongest.
500
What is the name of the simple machine that is made of a bar or board and is supported underneath by a fulcrum?
Lever
500
Name 2 things a pulley does.
A pulley moves objects up, down, and sideways. They help move a heavy object. They help move an object to a place that is hard to reach.
500
What does a wedge do?
It pushes or splits objects apart.
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