| A | B |
|---|
| an area of high mostly flat land that rises above the surrounding land | plateau |
| the set of imaginary lines on a globe or map that run north or south | lines of longitude |
| the position of a place in relation to other places on Earth | relative location |
| a river or stream that flows into a larger river or stream | tributary |
| to use again | recycle |
| low land that lies along an ocean | coastal plain |
| protecting our natural resources and using them wisely | conservation |
| the wearing away of the Earth's surface | erosion |
| an imaginary line that runs through the Earth from the North Pole to the South Pole | axis |
| the amount of moisture in the air | humidity |
| the set of imaginary lines on a map or globe that run east or west | lines of latitude |
| a triangle-shaped area of land at the mouth of a river | delta |
| the place where a river empties into some larger body of water | mouth |
| rain, sleet, or snow | precipitation |
| a natural resource used to make heat or energy | fuel |
| land almost entirely surrounded by water | peninsula |
| the place where a river starts | source |
| a bowl shaped area that is mostly dry | basin |
