A force that makes moving objects slow down or stop.
What is FRICTION?
100
A simple machine made of a bar or board that is supported underneath at the fulcrum.
What is a LEVER?
100
The ends of a bar magnet are called what?
What are POLES?
100
Rabbits use these as wedges to loosen soil.
What is a RABBIT'S CLAWS?
100
The teeth on the wheels inside a watch are an example of what?
What are GEARS?
200
A push or a pull.
What is FORCE?
200
A simple machine used to hold objects together.
What is a SCREW?
200
A north pole and a south pole will do this...
What is ATTRACT?
200
A burying beetle uses its front legs like a ______ to dig into the ground.
What is a SHOVEL or LEVER?
200
The bottom of a bathtub is this type of simple machine.
What is an INCLINED PLANE?
300
This force pulls objects toward the center of the earth.
What is GRAVITY?
300
A simple machine that is a flat surface with one end higher than the other.
What is an INCLINED PLANE?
300
When hanging freely on the end of a string, the north pole of a magnet will point in this direction.
What is NORTH?
300
Beavers have long front teeth with sharp edges that act like this simple machine when cutting down trees.
What is a WEDGE?
300
You need to apply more force or less force to move heavier objects?
What is MORE FORCE?
400
The force that magnets produce.
What is MAGNETISM?
400
A simple machine used to cut or split an object.
What is a WEDGE?
400
A pushing or pulling force.
What is MAGNETISM?
400
Some birds use their beaks like a pair of tongs to scoop up fish from the water or to pluck berries for food. Tongs are really two ________ fastened together at one end.
What are LEVERS?
400
Friction also causes this type of energy.
What is HEAT?
500
This changes the way that an object moves, the direction an object moves, and the speed at which an object moves.
What is a FORCE?
500
A simple machine that has a center rod attached to a wheel.
What is a wheel and axle?
500
If you try to put two like poles together they will do this.
What is REPEL?
500
These animals have strong jaws that they use to chisel their way through wood like a wedge.
What are CARPENTER ANTS?
500
The weight of an object tells how much __________ is pulling on it.