Unit 7B

The water beneath earth's surface

• groundwater

• aquifer

• surface water

• runoff

Land where water runoff drains into the corresponding river

• watershed

• water table

• aquifer

water found above ground in lakes, rivers, and streams

• surface water

• runoff

• water table

A body of rock underground that holds water

• Aquifer

• groundwater

• watershed

Little streams that drain into a river system

• tributaries

• watershed

• river systems

water that is safe to drink

• potable

• unpotable

• High Ph

• Low PH

water that flows into nearby rivers, streams, or lakes

• runoff

• freshwater

• saltwater

Pollution that causes an overgrowth of algae

• eutropophication

• chemical pollution

• thermal pollution

• biological pollution