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transpiration.jpgTrees and plants use much of the precipitation to grow. They absorb the water through their roots and then release it back into the air as water vapor.This is called "transpiration."

The groundwater the plants didn't use, flows through the earth until it comes back out to the surface to such places as springs, wells, creeks or lakes.Then it is the surface water, which flows to the ocean and also gradually evaporates back to the atmosphere.