Term
| What part of soil contains decaying plants and animals? |
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Definition
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Term
| Minerals and organic matter make up how much of soil? |
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Definition
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Term
| A process that breaks down rocks into smaller pieces is called? |
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Definition
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Term
| What breaks down rocks without changing their chemical composition? |
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Definition
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Term
| What breaks down rocks by changing their chemical composition? |
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Definition
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Term
| What might cause physical weathering? |
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Definition
| growing plants, burrowing animal, expanding ice |
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Term
| What types of rocks are formed from weathered sediment? |
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Definition
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Term
| How long does the weathering process take? |
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Definition
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Term
| How do plants break up rocks? |
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Definition
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Term
| What can help protect soil against erosion? |
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Definition
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Term
| What is a large mountain of ice moving slowly on land called? |
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Definition
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Term
| What does erosion move around? |
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Definition
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Term
| What are major weathering agents? |
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Definition
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Term
| How does erosion move stuff? |
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Definition
running water and rain
glaciers and ocean currents |
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Term
| Over thousands of years running water can create __________. |
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Definition
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Term
| What is the result when the ocean breaks pebbles into smaller and smaller pieces? |
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Definition
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Term
| why is it hard to see glacier erosion in action? |
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Definition
| because glaciers move very, very slowly |
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Term
| What are small pieces of rock and minerals traveling down a stream called? |
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Definition
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Term
| What is it called when sediments scrape against many rocks and leave marks? |
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Definition
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Term
| Rains fall into a crack in the road, temperatures fall, and then warm up causing a pot hole. This is an example of ____________. |
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Definition
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Term
| The sun beats down on the parking lot during the day and the cold nights cause broken pavement. This is an example of ________. |
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Definition
| thermal expansion/contraction |
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Term
| Mountain peaks becoming rounded is an example of ____________. |
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Definition
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Term
| What causes cracks in sidewalks? |
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Definition
| Growing tree roots, freeze/thaw |
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