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Earth's Plumbing System |
| edHelper's suggested reading level: | high interest, readability grades 4 to 6 | |
| Flesch-Kincaid grade level: | 4.71 |
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Earth's Plumbing System
By Patti Hutchison |
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1 Surface water, groundwater, springs, lakes, and rivers: They all work together to give us a kind of natural plumbing system. We rely on this system for the water we use every day. But how does it all work?