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
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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