1. weathering is the process that breaks rocks into smaller and smaller pieces called sediment.

2. erosion-the process that moves this sediment to another location.

3. deposition-when sediment that is being moved is dropped or deposited in a new location.

4. forces that cause erosion are wind, water, gravity, and glaciers.

5. forces that cause deposition are wind, water, gravity, and glaciers.  Water is the major cause of weathering, erosion, and deposition.

6. sand dunes are an example of deposition caused by the wind.

7. deltas are formed at the mouths of rivers when the river enters a large body of water such as a lake or the ocean.  The water slows down and drops the sediment it is carrying. As the sediment piles up, it forms a delta.

8. beach sand is moved by waves and ocean currents.  

9. longshore currents carry sand up and down the beach.  they help form barrier islands which help protect the land from hurricanes.

10. glaciers carve out huge amounts of rock and sediment and carry it as they slide downhill.  As they melt, they leave behind this sediment.  Glaciers carved out the Great Lakes.

11. mountains are constantly being worn down and carried away by the forces of weathering, erosion, and deposition.