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Biogeochemical
Big word; simple idea Bio = life Geo = earth Chemical = substanceSo biogeochemical = substances involved with life on earth.
Water Is Everywhere
75% of the earth’s surface is covered with water.
All living things contain water.
There is water in the atmosphere.
Transpiration
Plants return water to the atmosphere.
Plant sucks in water through roots
Plant loses water through leaves
Infiltration
Water goes into the ground. It filters through soil, rocks, etc.
Diagram courtesy of the U.S. Geological Survey
Runoff Some water moves along the surface of the ground collecting in low areas.
Diagram courtesy of the U.S. Geological Survey
Ground Water
Water filters into soil and rock until it comes to rocks it cannot pass through.
Water may fill spaces in rocks and soil.
An aquifer is a pool of underground water.