| A | B |
|---|
| energy | the ability to do work |
| work | exerting a force over a distance |
| formula for work | W=Fd |
| force | a push or a pull |
| 1st law of energy | energy can be changed from one form to another but cannot be created or destroyed |
| potential energy | stored energy-can be stored three ways |
| gravitational | force of gravity |
| chemical | energy of chemical bonds |
| elastic | energy stored in physical bonds |
| kinetic energy | energy of motion |
| 2nd law of energy | energy goes from a more usable form (high quality) to a less usable form (low quality) |
| high quality | fossil fuels and solar energy |
| low quality | heat energy |
| heat | waste energy that cannot be reused to do work |
| entropy | a measure of the amount of waste energy in a system |
| renewable resources | resources that can be replaced (you can get more) |
| non-renewable resources | limited a supply |
| examples of renewable resources | water, light, heat, plants, wood, air |
| examples of non-renewable resources | plastic, rocks, minerals, fossil fuels, most mined resources |
| fossil fuels | coal, oil, natural gas---people are mostly dependent on them |
| BTU | British Thermal Unit |
