force - a push or pull, direction - a force can change the speed and _________ of an object, speed - how fast or slow and object is moving, more - you must use ________ force when an object is heavier, wind - a powerful force in nature, Newton - scientist who explained gravity, three - number of Laws of Motion, inertia - object at rest will stay at rest, object in motion will stay in motion, unless acted on by a stronger force, mass - the greater the ________ the more force is needed to move the object, reaction - every action has an equal and opposite __________, acceleration - a change in speed, light - the speed of ________ is the fastest thing of all, friction - a force that acts in the opposite direction of movement, gravity - the force of attraction between 2 objects, magnetism - can push together or pull apart certain metals, attract - when magnets pull together, repel - when magnets push apart, electromagnet - magnets created by electricity, north - a north and ________ pole will repel, south - a north and _______ pole will attract,

FORCE & MOTION

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