1. Weathering The process of breaking down of rocks into smaller and smaller pieces of rock. These small pieces are known as sediment. Sediment breaks down further and becomes soil. YehliuTaiwan-HoneycombWeathering 180px-GeologicalExfoliationOfGraniteRock

2.  Ice Wedging- Water in the cracks of rocks freeze  Abrasion- Particles of sand are carried by the wind and water  Plant Action – roots from plants grow in the cracks of rocks  Release pressure – when pressure is removed from rocks Types of Mechanical Weathering

3. Erosion  Erosion takes rocks and other particles from one location and puts them in another.  Weathering is breaking up rocks erosion is carrying them away.

4. The Agents of Erosion  Wind  Water  Glaciers  Gravity / Mass Movement

5. Wind Erosion  Wind can carry sand, silt, and clay from one place and deposit it in another.  This type of erosion is most frequent in dry areas with little or no vegetation.

6. Wind Erosion http://upload.wikimedia.org/wikipedia/en/1/15/Mesquite_Sand_Dunes.JPG

7. Gravity/Mass Movement Erosion  Gravity is the force behind Water  Gravity alone can cause Erosion

8. Gravity/Mass Movement Erosion http://en.wikipedia.org/wiki/Erosion#Gravity_erosion

9.  Slump  Creep  Rockfalls  Rockslides  Mudflows  Landslides Types of Gravity/Mass Movement Erosion

10. Slump http://geology.about.com/library/bl/images/blslump.htm  A slump occurs when a mass of land slips and moves down a slope.  A slump occurs when the slope becomes too steep and the material under it can not support the ground above it.

11. Creep  Sediment slowly moves down hill.  Leaning trees and fence post are clues that creeping is occurring

12. Deposition http://education.usgs.gov/lessons/schoolyard/RockSedimentary.html  Process by which sediments, soil and rocks are added to a landform or land mass (the end of erosion).

14. What is a watershed? It is the area of land and waterways that drain to a water body.

15. Water Pollution

16. There are two types of water pollution, point source and non-point source. Point source pollution is pollution that is directly put in to the water. Non – point source is pollution that happens somewhere else and then runs into the water.