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science chapter b2

simple machines

forcea push or a pull
frictionthe force caused by two objects rubbing together that slows down or stops moving objects
gravitythe force that pulls objects toward the center of the earth
magnetismthe force that causes magnets to pull on objects that are made of certain metals such as iron
polesa place on a magnet where magnetism is strongest
worksomething done whenever a force moves an object through a distance
simple machineone of six kinds of tools with few or no moving parts that make work easier
leversimple machine made of a bar or board that is supported underneath at the fulcrum
fulcrumthe point on which a lever is supported and moves
inclined planea simple machine that is a flat surface with one end higher than the other
screwa simple machine used to hold objects together
wedgea simple machine used to cut or split an object
pulleya simple machine made of a wheel and a rope
geara wheel with jagged edges like teeth
wheel and axlea simple machine that has a center rod attached to a wheel

Mrs. Larson

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