| A | B |
|---|
| energy | ability to do work |
| kinetic energy | energy of motion |
| potential energy | stored motion |
| mechanical energy | energy in moving things |
| electromagnetic energy | energy of moving electrons |
| heat energy | energy of moving particles of matter |
| chemical energy | energy that hold particles of matter together |
| nuclear energy | energy stored in the nucleus of atoms |
| thermal pollution | damage that occurs when waste heat enters the environment |
| law of conservation of energy | energy con not be made or destroyed, but only changed in form |
| scientific theory | an idea supported by evidence over time |
| work | force times distance |
| joule | metric unit of work; equal to 1 N-m |
| power | amount of work done per unit of time |
| watt | metric unit of power; equal to 1 J/sec |
| force | a push or pul |
| gravity | force or attraction between all objects in the universe |
| newton | metric unit of force |
| air resistance | force thta opposes the movement of an object in air |
| vacuum | empty space |
| friction | force that opposes the motion of an object |
| pressure | force per unit area |
| barometer | measures air pressure |
| manometer | measures fluid pressure |
