Glossary

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area where there is more rain

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the decayed organic material (plant and animal matter) that forms the top layer of soil

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(also called fracking) the process of drilling for shale gas (a natural gas) and extracting...

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a graph showing the runoff of a river in relation to discharge and time after the rain

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(also called a water cycle) the cycle of evaporation and condensation that controls the...

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