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Unit 4: Beaches and Erosion

Unit 4: Beaches and Erosion. 10/24/11. Floods Reflection. 1.) Which stream would most likely have the least erosive energy? A . A stream with high gradient B . A stream carrying large rocks and pebbles C . A stream after a storm D . A stream on flat ground

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Unit 4: Beaches and Erosion

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  1. Unit 4: Beaches and Erosion 10/24/11

  2. Floods Reflection 1.) Which stream would most likely have the least erosive energy? A. A stream with high gradient B. A stream carrying large rocks and pebbles C. A stream after a storm D. A stream on flat ground 2.) The Colorado River watershed covers parts of Colorado, Utah, Arizona, and California. What are the streams and rivers that flow into the Colorado River called? A. Aquifers B. Gradients C. Tributaries D. Deltas 3.) A stream’s ability to erode is influenced by gradient, discharge, and load. Which of the streams below will most likely have the fastest rate of erosion? A. A stream with low gradient B. A stream with small particles in its load C. A stream near a delta D. A stream being fed by snow melt 4.) How are alluvial fans different than deltas? 10/22/12 10/22/12 Observe, Question, Comment [Set up the next page of your Interactive Notebook and complete the Do Now] Floods 32R 32L

  3. Oxbow lake demo • Draw a diagram of what you observe. Label the area where erosion caused the oxbow lake. Draw arrows to show the direction of the stream, including how the direction changed. • How does this demonstration show how water running downhill shapes Earth’s landscape?

  4. Beach inquiry Why is there sand at the beach? How is sand formed? http://www.youtube.com/watch?v=QJO3ROT-A4E

  5. Textbook exploration Person A reads “Wave Deposits” Person B reads “Beach Materials” Person C reads “Beach Composition” Person D reads “California Beaches”

  6. Textbook exploration • A _____________ is an area of shoreline that is made up of deposited sediment. • Beaches vary in texture, size, and ______________. • The ______________ of beach material depends on the material’s source (ex: black lava, white sandstone, etc.). • California has both ______________ and sandy shores. • Rocky beaches form where _____________ meet the ocean and sandy beaches form where on gently _____________ land.

  7. reflection As the ice caps melt and more water flows across the land, what will happen to our landscape? (Think about along the coasts/beaches and in rivers with flooding)

  8. Unit 4 Review Do Now List as many examples of how erosion and deposition have affected the California landscape as you can. Then pick 3 to explain how they have affected the landscape. 10/24/12 10/24/12 Observe, Question, Comment [Set up the next page of your Interactive Notebook and complete the Do Now] Unit 4 Review 33R 33L

  9. Do now answers • Canyons from water erosion • Sand Dunes from wind erosion • Valleys from ice/glacier erosion • Landslides from gravity erosion • New river directions from foods/oxbow lakes • Beaches from wave erosion/deposition • Deltas and alluvial fans from deposition

  10. Beach ball review What are the 4 agents of erosion? Wind, Water, Ice, Gravity

  11. Beach ball review Which landform occurs when rivers deposit a large load onto dry land? Alluvial Fan

  12. Beach ball review What are the three factors that affect the rate of erosion? Gradient, Discharge, Load

  13. Beach ball review What do you call how fast and powerful erosion is? Erosive Energy

  14. Beach ball review What are two landforms that can form because of flooding? Floodplain and Oxbow Lake

  15. Beach ball review What do you call the path that a stream or river flows in? Channel

  16. Beach ball review What is the energy that causes shoreline erosion? Wave Energy

  17. Beach ball review The material that makes up a beach affects the beach’s ________. Color

  18. Beach ball review What is one benefit and one damage of floods? Fertile soil (benefit) and destroys life (damage)

  19. homework Unit 4 Study Guide due Thursday TEST ON THURSDAY

  20. Unit 4 Review Do Now Fill in the Blank: During a flood, when a stream’s bank collapses and changes the stream’s course, a ___________ is formed. ________ is where land and a body of water meet ___________ are small pieces of rock formed when rock is eroded (usually by water and wave energy) The area along a river that forms from sediment deposited when a river overflows is a __________. Energy used for erosion formed by wind moving the water and creating waves is called __________. A _________ occurs when a stream overflows its banks. 10/24/12 10/24/12 Observe, Question, Comment [Set up the next page of your Interactive Notebook and complete the Do Now] Unit 4 Review 33R Continued 33L Continued

  21. Bill Nye: Rivers and Streams Write down 6 ways that you see rivers changing the landscape

  22. homework NONE 

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