| A | B |
|---|
| weathering | The way rocks are broken down into smaller pieces |
| What wears down landforms? | water, wind, moving ice |
| How long does it take for weathering to break down rocks to become soil? | Thousands of years |
| erosion | The movement of weathered rock and soil. |
| creep | A very slow type of erosion that moves rocks and soil. |
| What can help hold soil in place by keeping water from washing rich soil away from farmlands? | plants |
| Can erosion change the land without weathering? | No, because weathering is needed in breaking down rock first so it can then be moved. |
| landform | A natural shape on the earth's surface, which includes both dry land and ocean floors |
| mountain | A place on the earth's surface that is much higher than the land around it. |
| valley | A low area between higher landforms, such as mountains. |
| canyon | A valley with steep sides that have been carved by forces of nature. |
| plain | A wide, flat area on Earth's surface. |
| plateau | A flat area hight than the land around it. Most are wide and some have very steep sides. |
| glaciers | A huge block of moving ice found where it is cold and the snow never melts. |
| When glaciers move _________. | They pick up rocks and soil. |
| When glaciers melt _______> | They drop the rocks and soil, which can form hills and ridges. |
| earthquake | The shaking of Earth's surface caused by the movement in the earth's crust. |
| volcano | An opening on Earth's surface from which lava flows. |
| flood | A large amount of water that covers normally dry land. |
