Warm-up

1. Warm-up When you are finished with your quiz, grab an article and answer the questions on the back of the article. Attach the article to page 54 in your notebook and answer the questions underneath

2. Erosion and Deposition Pg. 53

4. Gravity’s Role in Erosion Gravity pulls materials down slope Streams wouldn’t flow Also an agent of landslides, mud flows, and avalanches

5. Erosion by water Except for hurricanes and tornados, water has the greatest power to move masses of material Erosion greatest when there is a large rapidly moving body of water Water running down steep slopes also has a lot of power Rill erosion- by running water in small channels on the side of a slope Gully erosion- when a channel becomes deep and wide

6. Water erosion

7. Coastal deposition and erosion Deposition- last step of erosion; materials are dropped in another location When rivers enter a large body of water, it slows and deposits large amounts of sediments Build up of sediments forms deltas Contains fertile soil Ocean currents can then form sand bars and barrier islands

8. Deposition

9. Glacial Erosion Only cover 10% of earth’s surface Large-scale erosion

10. Wind Erosion Occurs in areas with limited precipitation and high temperatures Little vegetation to hold soil in place Wind barriers are used to prevent wind erosion Usually just a row of tress planted perpendicular to the direction of the wind.

11. Erosion by plants, animals, and humans Plants and animals move weathered material with them Human excavating aids in erosion Effects are minimal compared to wind, water, and ice erosion