Force - any push or pull, Speed - the rate at which an object changes position, Gravity - the force that pulls all objects toward each other., Velocity - the speed and the direction an object is moving, Reference point - a place or object used to determine if an object is in motion, Motion - a change in the position of an object, mass - the amount of matter in an object, weight - how strong the force of gravity is on an object,

practice science motion

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