| A | B |
|---|
| atmosphere | air surrounding the earth |
| tundra | huge,treeless plain bordering the Arctic Ocean |
| barren | not able to produce much |
| reservoir | a place where water or some other substance is stored for later use |
| topography | the surface features of an area of land |
| precipitation | any form of water that fall from the sky |
| bayou | a slow -moving stream that flows through swampy land |
| plateau | a large highland plain |
| census | an official count of all people in a certain area or country |
| nomad | a group of people who move from place to place |
| cultivation | to prepare the ground for growing crops |
| monsoon | a strong,steady wind that blows in southern Asia causing heavy rains |
| cyclone | tornado |
| meridian | imaginary line line on the earth from the North Pole to the South Pole |
| delta | a fan-shaped deposit of mud and sand |
| estuary | an arm of the sea where fresh and salt water is mixed |
| eclipse | darking or hiding of the sun or moon |
| basin | area of land where from which water run down into a river |
| elevation | the height above sea level |
| equator | an imaginary line around the center of the earth halfway between the Poles |
| isthmus | a narrow strip of land with water on each side |
| famine | serious lack of food |
| humidity | amount of water vapor in the air |
| geyser | a spring that shoots hot water and steam in to the air |
