| A | B |
|---|
| surface water | freshwater found above ground in lakes, ponds,rivers and streams |
| sludge | solid material left over after waste water treatment |
| recharge zone | area of land on the earth's surface from which ground water originates |
| point pollution | pollution that came from a single source |
| nonpoint pollution | pollution that comes from many sources |
| pathogens | disease causing organisms |
| irrigation | process of supplying water to an area by artificial means |
| groundwater | water that seeps down thru the soil and is stored underground |
| desalinisation | salt is removed from salt water, rendering the water fit for drinking and cooking |
| freshwater | water that contains little salt |
| Clean Water Act | to restore and maintain the chemical, physical, and biological integrity of the nation's waters |
| aquifer | an underground rock formation that contains water |
| bioaccumulation | accumulation of larger and larger amounts of a toxin within the tissues of organisms |
| thermal pollution | addition of excessive amounts of heat to a body of water,such as in run-off from industrial cooling systems |
| Wastewater Treatment Plant | structure that filters out contaminants from wastewater |
| water pollution | introduction of foreign substances into water that degrade its quality, limit its use, and affect organisms living in it or drinking it |
| watershed | entire area of land that drains into a river |
| artificial eutrophication | introducition of inorganic plant nutrients into a body of water thru sewage and fertiliser run-off |
| water | contains hydrogen and oxygen |
| salt water | water that contains salt |
| algae | a plant in the ocean that fish can feed off of |
| phytoplankton | plankton that is often found at the surface of the water |
| name of 4 oceans | atlantic pacific artic indian |
| name of longest river | nile |
| name of biggest river | amazon |
