1) to become different a) change b) force c) friction 2) the ability to do work a) force b) energy c) push 3) a push or pull that makes matter move a) friction b) mass c) force 4) the force caused by things rubbing together a) mass b) matter c) friction 5) the force that pulls objects together a) gravity b) mass c) magnetism 6) anything that has mass and takes up space a) light b) sound c) matter 7) a change in the position of an object a) heat/thermal b) motion c) energy 8) a force that moves objects closer a) light b) pull c) push 9) a force that moves objects farther away a) change b) push c) pull 10) the energy that travels through space quickly; this allows us to see things a) sound b) light c) heat 11) energy produced by vibrations a) sound b) light c) heat 12) energy that is produced by the movement of particles in matter a) heat/thermal b) sound c) light 13) energy from movement (motion) a) magnetism b) change c) mechanical energy 14) the amount of matter in the object a) pull b) push c) mass 15) the force of repulsion (pushing) or attraction (pulling) between poles of a magnet a) motion b) friction c) magnetism

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