| A | B |
|---|
| water vapor | water in the form of gas |
| water cycle | water goes from ocean to air, to ground, and back to ocean |
| evaporation | sun's heat turns liquid water into water vapor |
| condensation | water vapor changes back into a liquid |
| precipitation | rain, snow, sleet, hail |
| collection | streams and rivers carry water back to oceans |
| glacier | giant sheets of ice |
| groundwater | water that fills tiny crack and holes in the rock layers below the surface of earth |
| aquifer | underground rock layers that water flows through |
| weather | unpredicatable changes in air |
| climate | predictable pattern of weather in an area over a long period of time |
| Tropics | low latitudes near the equator |
| drought | long period of extreme dryness |
| El Nino | cold winds from the east are weak increasing precipitation |
| La Nina | cold winds from the east are strong |
| current | moving streams of water |
| local wind | patterns of winds caused by landforms |
| rain shadow | dry area on one side of mountain |
| greenhouse effect | gases trapped in earth's atmosphere |
| rain forest | dense forest along the Equator |
| savanna | broad grasslands |
| marine west coast climate | rainy and mild winters, and mild summers caused by winds from the ocean |
| Mediterranean climate | mid-latitude climate has mild rainy winters, but hot dry summers |
| humid continental climate | winters are long, cold, and snowy, summers are usually short and hot. |
| humid sub tropical climate | rains throughout the year has hot summers, and winters are short and mild |
| sub artic | in high latitudes, very cold bitter winters, summer temp rises above freezing |
| tundra | harsh dry climate that stays frozen most of the year. Vast and treeless |
| steppe | deserts surronded by partly dry grasslands and prairies. |
| acid rain | chemicals in air pollution that falls as precipitation |
| deforestation | cutting down trees without replanting them |
| crop rotation | changing what is planted in a field |
| conservation | careful use of resources |
| irrigation | collecting water and distributing them to crops |
| pesticide | powerful chemicals that kill insects |
| ecosystem | places where plants and animals are dependent upon one another |
