| A | B |
| peninsula | An area of land surrounded by water on three sides |
| canyon | A deep, narrow valley with steep sides |
| coast | Land alongside a large body of water |
| mountain | An area that rises at least 2000 ft. above sea level |
| cape | An area of land surrounded by water on three sides |
| gulf | A large area of ocean reaching into land |
| tributary | A river or stream that flows into a larger river |
| delta | A plain at the mouth of a river |
| swamp | A piece of wet, spongy land |
| strait | Narrow stretch of water joining two larger bodies of water |
| desert climate | climate with fewer than 10 inches (25 cm) of rainfall per year |
| timberline | elevation above which no trees grow |
| evaporation | the sun's heat turns water into vapor |
| rain shadow | dry area on the side of mountains facing away from the wind |
| irrigation | applying water to land areas to supply the needs of plants |
| vital | absolutely necessary |
| weather | specific condition of the atmosphere at a particular place and time |
| climate | pattern of weather in an area over a long period of time |
| acquifer | underground layer of rock that contains water |
| depletion | gradual using up or destruction of something valuable |