What is Sound Energy Sound is energy in

What is Sound Energy? • Sound: is energy in the form of vibrations that travel through matter. • Sound vibrations pass through the particles of matter in a kind of “domino effect”. • When a vibration reaches a particle of matter, that particle starts to vibrate, too. In this way, sound vibrations can spread out, not just in a straight line, , but in all directions.

What is Sound Energy? n Sound travels through air, so people can hear sounds. • You can place your hands on a radio or TV and n feel the sound vibrations. • n How • Do We hear sounds? ? Inside your ear there is a thin membrane called “ ear drum” , when vibrations in the air reaches the ear drum it vibrates & thus hearing begins, • Vibrations are transmitted & then changed into nerve messages that travel to the brain.

Energy Changes The process of transferring energy from one object to another. n Transfer = the same form of energy moving from one object to another

Energy Transfer Energy Form = HEAT Where hands to Where? ice

Energy Transfer Energy Form = KINETIC Where legs to Where? wheels

Energy Transfer Energy Form = ELECTRICAL Where outlet to Where? appliance (TV, computer, etc)

Energy Transfer Energy Form = LIGHT Where mirror to Where? eye

Energy Transfer Energy Form = SOUND Where drum to Where? ear

Energy Transfer Energy Form = CHEMICAL Where to Where? Fly Frog (food) (growth)

Energy can be transformed Transformation = converting one form of energy to another form of energy • People change energy from one form to another to make it usable in a different way. ( more useful to us )

Energy can be transformed Transformation = converting one form of energy to another form of energy • An electric blanket transforms electricity to heat. Then, the blanket transfers heat to our body.

Energy can be transformed Electrical energy is transferred from the wall socket to the computer. Electrical energy is transformed to sound and light energy when the computer is turned on. Electrical energy is transformed to heat energy when the computer stays on.

Energy can be transformed Light energy from the sun is transformed to chemical energy as the plants grow. Chemical energy is transformed to heat and kinetic energy as the panda eats the bamboo leaves.

Energy can be transformed The apple on the tree has potential energy due to its position. Potential energy is transformed into kinetic energy as the apple falls and hits the man’s head.

Energy Can Be Transformed Gasoline is a chemical energy. When gasoline is transferred into the car, a transformation occurs. Transformations within this system include: Heat energy Electrical energy Sound energy Kinetic energy Light energy

Energy can be transformed Batteries contain chemical energy that is changed to electrical energy. Electrical energy will be transformed through the bulb into light energy.

Energy can be transformed When you turn the crank of an emergency radio you give the radio potential energy that will be converted to electrical energy then to sound energy so that you can hear the radio without batteries or electricity. .