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the light energy that bounces off objects


the bending of light rays when they pass through a substance


a piece of clear material that bends, or refracts, light rays passing through it


an element of sound determined by the speed which sound waves move


the loudness of a sound


the average kinetic energy of all the molecules in an object

kinetic energy

the energy of motion, or energy in use


the transfer of thermal energy from one substance to another


the direct transfer of heat between objects that touch


the transfer of heat as a result of the mixing of a liquid or a gas


the transfer of thermal energy by electromagnetic waves

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