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Unit 6
Changes to Earth'sSurface
| Question | Answer |
|---|---|
| What causes weathering and erosion in a river? | Flowing water causes weathering and erosion. |
| What would you see in a landslide or mudslide? | Loose rocks or mud at the bottom of a hill |
| Name 2 things that can cause a rock to crack. | water freezing and thawing over and over plant roots growing in the cracks |
| How do plant roots help prevent weathering and erosion? | Plant roots hold the soil in place during rain or floods. |
| How does wind change the shape of land? | Wind can blow sand around and weather rock which changes its shape. It can also erode (move) the sand to form dunes. |
| How do rivers change over time? | Rivers get wider and straighter as they get older. |
| Tell if each action is a cause or an effect. 1. Chipmunks dig holes. __________ 2. Soil is worn away. __________ 3. Plant roots grow in rocks. ___________ 4. Rocks break apart. __________ | 1. cause 2. effect 3. cause 4. effect |
| . Tell how each item causes weathering. 1. ice 2. plant roots 3. water | 1. ice expands in the crack of a rock causing it to break 2. plant roots grow in the crack of a rock and cause it to break 3. water can get into a crack and freeze and thaw over and over causing the rock to crack |
Created by:
Mrs. Furlong
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