Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

4th Grade Ch 9 Lesson 2 How Do Weathered Materials Move

5,467 views

Published on

Published in: Education, Technology, Business
  • Be the first to comment

4th Grade Ch 9 Lesson 2 How Do Weathered Materials Move

  1. 1. Ch. 9 Lesson 2 How do weathered materials move?
  2. 2. erosion <ul><li>process of moving weathered rock by water, wind, ice & gravity </li></ul><ul><li>creates canyons & valleys </li></ul>
  3. 3. <ul><li>Waves constantly change the shape of the shoreline. </li></ul>
  4. 5. Rivers can make deep canyons by erosion. Grand Canyon
  5. 6. glacier <ul><li>large ice sheet in cold place </li></ul><ul><li>causes erosion </li></ul>
  6. 7. Glaciers
  7. 8. As a glacier melts, it wears away bits of rock and soil.
  8. 9. Glaciers [02:40]
  9. 10. deposition <ul><li>laying down of pieces of Earth’s surface </li></ul><ul><li>creates deltas – fan shaped area of land </li></ul>Weathering and Erosion YouTube video
  10. 11. River deltas
  11. 12. sand dunes
  12. 13. <ul><li>rapid downhill movement of a large amount of rock & soil - caused by gravity </li></ul>landslide
  13. 14. landslide
  14. 15. avalanche <ul><li>large amounts of snow & ice that fall rapidly down a mountain </li></ul>
  15. 16. Avalanche Control Team in Anchorage [03:34]
  16. 17. avalanche
  17. 18. ways to help reduce erosion <ul><li>grow plants on hills to prevent erosion </li></ul>
  18. 19. ways to help reduce erosion <ul><li>terracing - slows speed of rainfall </li></ul>
  19. 20. terracing building of step like ridges in hilly areas to prevent water runoff
  20. 21. ways to help reduce erosion <ul><li>build barriers to prevent waves </li></ul>
  21. 22. 2 ways to stop erosion of sand 1. jetty 2. sea wall
  22. 23. Fort Lauderdale beach sea wall
  23. 24. seawall
  24. 25. Activity- At the Beach <ul><li>Problem : How do waves affect the beach? </li></ul><ul><li>Hypothesis: I predict that the waves will affect the beach by _____. I predict that a jetty will help by _______. </li></ul><ul><li>Procedure: </li></ul><ul><li>Shape sand into a beach. </li></ul><ul><li>Pour water into side of pan opposite beach. </li></ul><ul><li>Make waves with popsicle stick. </li></ul><ul><li>Make beach again. </li></ul><ul><li>Make a jetty by piling pebbles in a line in middle of tray. </li></ul><ul><li>Make waves with popsicle stick. </li></ul><ul><li>Observations: </li></ul>
  25. 26. Activity-Hills & Valleys <ul><li>Problem: How does moving water shape the </li></ul><ul><li>land ? </li></ul><ul><li>Hypothesis: I predict that moving water (rain) </li></ul><ul><li>will cause the salt (mineral) to __________. </li></ul><ul><li>Observations: _________________________ </li></ul><ul><li>Conclusion: ___________________________ </li></ul>

×