HEAT ENERGY, Always move from warmer substance to cold substance., CONDUCTION, The transfer of heat through direct contact., CONVECTION, Warm fluids,rise, cool down, sink and then warm again., RADIATION, The transfer of heat through electromagnetic waves., PRIMARY, The Sun in the ___________ source of light and heat., SOUND ENERGY, a form of energy produced and transmitted  by vibrating matter., VIBRATION, Very fast, repeated backward and forward movement of particles of matter., LONGITUDINAL WAVES, Sound waves are examples of ________________., MEDIUM, Sound energy can travel in all matter solid, liquids and gas. These are called_________. , PITCH, It determine the high and low the sound is. , FREQUENCY, It is number of vibration in one second., AMPLITUDE, The height of the wave can make it louder by changing the ____________., ECHO, The sound bounces back from a hard surface., VOLUME, It is measured using sound level meter.

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