| A | B |
|---|
| chemical weathering | rocks change into other materials |
| contour lines | lines on a topographic map that indicate areas with the same elevation or height above sea level |
| crust | thin, rocky, outer layer of Earth that makes up the continents and the ocean floor |
| deposition | the dropping, or releasing, of sediments that have been removed from one place to another |
| destructive forces | breaks things down |
| earthquake | violent shaking of Earth's crust as built up energy is released |
| epicenter | point on Earth's surface directly above the focus of an earthquake |
| erosion | the carrying away of sediments by moving water, wind, or moving ice |
| mechanical weathering | the breaking of larger rocks into smaller pieces |
| plate tectonics | theory that giant plates of crust are moving slowly across Earth's surface |
| sediment | smaller pieces of rock |
| topographic map | map that shows the shape of surface features and their elevations above sea level |
| weathering | a destructive force: two types: mechanical and chemical |
