1. Water Resources Hydrology- study of water

2. Freshwater Pollution  Point Source Pollution- pollution that comes from a specific location  Ex. A leaking landfill  Nonpoint pollution is pollution that does not have a specific point of origin. –Ex. Runoff-can carry waste oil from streets, wash sediment from construction. –Carries water from fertilizer, pesticides, animal feed lots.

3. Stream flow  The ability of a stream to erode and transport materials depends largely on velocity.  Discharge- The volume of water flowing past a certain point in a given unit of time.

4. Gradient is the slope or steepness of a stream channel.

5. Gradient- meandering

6. Tributary- a stream that empties into another stream

7. Laws to protect our environment  Montreal Protocol -Treaty to ban the use of ozone depleting chemicals  Kyoto Protocol- International Agreement to help regulate climate change  International Panel on Climate Change- group who meets to discuss possible solutions to climate change.  International Whaling Commission- Set regulations and bans on killing whales.  Convention of Trade of Endangered Species- Treaty which helps regulate the trading and selling of endangered species.

8. Erosion  Streams generally erode their channels lifting particles by abrasion, grinding, and by dissolving.  Beach erosion occurs because of wind and waves and human urbanization.