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![]() edHelper.com Earth Rocks and Minerals |
Stress and Strain in the Life of a Rock |
| edHelper's suggested reading level: | high interest, readability grades 3 to 5 | |
| Flesch-Kincaid grade level: | 3.43 |
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Stress and Strain in the Life of a Rock
By Patti Hutchison |
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1 The earth's surface is constantly changing. We don't usually see the changes because they happen so slowly. But earth's crust is always being pushed, pulled, folded, and broken. What causes these changes? Stress.