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WJSH 8 Energy
Energy
| Question | Answer |
|---|---|
| energy | the ability to cause change |
| kinetic energy | energy of motion |
| potential energy | stored energy |
| mechanical energy | energy that moves objects |
| sound energy | results from the vibration of particles in a solid, liquid or gas |
| chemical energy | energy that is stored in the chemical composition of matter |
| thermal energy | total amount of energy from the movement of particles in matter (causes heat) |
| electromagnetic energy | energy transmitted through space in the form of electromagnetic waves (visible light, x-rays, microwaves) |
| nuclear energy | energy from the center (nucleus) of an atom |
| law of conservation of energy | energy cannot be created or destroyed |
| energy efficiency | measurement of usable energy after an energy conversion |
| kinetic theory of matter | all the particles that make up matter are always in motion |
| temperature | measure of the average kinetic energy |
| thermal expansion | solids, liquids, and gases expand when their temperature increases |
| heat | flow of energy from an object at a warmer temperature to a cooler temperature |
| specific heat | the amount of energy required to raise the temperature of 1 gram of a substance by 1 degree Celcius |
| conduction | the process that moves energy from one object to another when they are touching physically |
| conductor | material that transfers energy easily (metals) |
| insulator | material that does NOT transfer heat easily (foam, plastic, wood, etc.) |
| convection | the process by which cooler and denser air or liquid sinks, pushing the warmer up |
| radiation | energy that travels as electromagnetic waves, which include visible light, microwaves, and infrared light (Sun is most significant source) |