| A | B |
|---|
| climate | The average weather for a particular place over time. |
| Ice Age | The most recent period when the earth became colder and much of the earth was covered with ice |
| global warming | An increase in the ave. temperature of the earth's atmosphere |
| atmosphere | The thin layer of gases mostly nitrogen, oxygen and other gases surrounding the Earth |
| greenhouse effect | When gases in the Earth's atmospher trap heat energy from the sun |
| Industrial Revolution | Began 250 yrs. ago - work was done by machine rather than by hand |
| greenhouse gas | A group of gases - water vapor, carbon dioxide, methane, ozone that trap the sun's heat |
| droughts | Extremely dry weather for a long period of time |
| conserve | To use carefully or sparingly; to avoid wasting material |
| compact fluorescent bulb | Light bulb with a gas in the tube and special material on the glass- gives off light from electricity passing through |
| incandescent bulb | Light bulb with a metal filament, becomes hot and glows |
