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Friday 1/10/14

Objective : SWBAT differentiate between types of erosion. SWBAT describe methods of preventing erosion. Do Now : Review the exemplar notes (class set) and answer the following questions on a separate piece of paper:

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Friday 1/10/14

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  1. Objective: SWBAT differentiate between types of erosion. SWBAT describe methods of preventing erosion. Do Now: Review the exemplar notes (class set) and answer the following questions on a separate piece of paper: • How are these notes similar to notes that you’ve been taking in APES or your other classes? • How are these notes different from notes that you’ve been taking in APES or your other classes? Friday 1/10/14 Agenda: • Chapter 12 Quiz • What Causes Erosion? • Landslides, Dust Clouds, and Mudslides Life’s Work: Complete Soil Lab questions (due Monday) NEXT Week at a Glance:

  2. New Year’s Resolutions: Spring 2014 • On Tuesday, your Do Now was to write on a Post-It note: • #2: How are you going to improve in APES this year? • Here’s what you said:

  3. WateR: The most powerful force on Earth • http://www.youtube.com/watch?v=MFpCJsc_k64

  4. Bill Nye’s “Erosion” • As you watch the video, construct a definition of the word “erosion.” • Write it in the box on your Guided Notes. • Be prepared to share out. • http://www.youtube.com/watch?v=J-ULcVdeqgE

  5. What is Erosion?Why is it important? • Erosion: the movement of soil components, especially surface litter and topsoil, from one place to another. • Soil erosion lowers soil fertility and can deposit eroded sediment into nearby bodies of water. • What are the effects of sediment pollution on aquatic ecosystems?

  6. The Causes and effects of erosion Undisturbed Soil Is NOT vulnerable to erosion Disturbed Soil Is vulnerable to erosion This is caused by farming, logging, construction, overgrazing by livestock, off-road vehicles, and the deliberate burning of vegetation

  7. Types of Soil Erosion • Sheet erosion: water or wind peels off thin layers of soil. • Rill erosion: fast-flowing rivulets of surface water make small channels. • Gully erosion: fast-flowing water rivulets join together to cut wider and deeper ditches or gullies.

  8. Types of Water Erosion • Splash erosion: water hits the soil at a severe angle • Mass slippage: water pushes large amounts of soil away in large chunks (mudslides)

  9. Types of Wind Erosion • Saltation: wind lifts soil particles into the air and they bounce across the soil • Suspension:small, light particles are lifted into the air by wind and are carried for long distances (dust cloud) • Surface Creep: wind pushes larger, heavier particles to slide or roll across the ground (landslides)

  10. Erosion in action: Clip #1 • Name the type of erosion shown in the clip and describe how it occurs. http://www.youtube.com/watch?v=95tmYmeHf84

  11. Erosion in action: Clip #2 • Name the type of erosion shown in the clip and describe how it occurs. http://www.youtube.com/watch?v=H_9qan4-NuM

  12. Erosion in action: Clip #3 • Name the type of erosion shown in the clip and describe how it occurs. http://www.youtube.com/watch?v=n1cCs-S5EKc

  13. Erosion in action: Clip #4 • Name the type of erosion shown in the clip and describe how it occurs. http://www.youtube.com/watch?v=WaBBRmD8QHg

  14. Methods for Controlling Erosion • 1. Shelterbelt: long rows of trees are planted to partially block the wind. They can also help retain soil moisture, supply some wood for fuel, and provide habitats for birds.

  15. Methods for Controlling Erosion • 2. Minimum-Till or No-Till Agriculture: special tillers break up the soil without disturbing cover vegetation *This is a very effective method that also increases crop yield and lowers water and pesticide use.

  16. Methods for Controlling Erosion • 3. Contour Farming: the use of terraces that follow the slope of the land Terracing: what you use for contour farming; dirt ledges that hold the soil in place and reduce runoff and erosion

  17. Methods for Controlling Erosion • 4. Strip cropping: alternating rows of closely-sown crops with rows of strip crops Strip crops: corn, soybeans, cotton Closely-sown crops: hay, wheat

  18. Methods for Controlling Erosion • 5. Cover cropping/Alley cropping: several crops are planted together in strips between rows of trees Rows of trees are planted on either side of the crops Multiple types of crops are grown together

  19. How do these Farming methods help the environment? • On your Guided Notes, you have a list of environmental effects. • Some are harmful consequences, and some are helpful benefits. • Write the number of each effect in the correct box. Some numbers may be used more than once.

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