| A | B |
| climate | weather conditions many years |
| condense | to change from a gas into a liquid |
| water vapor | water in the form of an invisible gas |
| humidity | the amount of water vapor in the air |
| evaporate | to change from a liquid into a gas |
| precipitation | anu form of water that falls to the earth from a cloud |
| runoff | water that falls onto land and drains off the surface |
| infrared radiation | ENERGY with a wavelength longer than a wavelength of light |
| greenhouse GASES | carbon dioxide, water vapor and other GASES in the atmosphere that absorb infrared radiation from the earth's surface |
| greenhouse EFFECT | the PROCESS by which the gases in the atmosphere ABSORB heat and keep the earth WARM |
| global warming | an INCREASE in the earth's temperature |