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Activating Strategy

Activating Strategy. Study Jams Video Breaker and Whoosh JUST WRITE THE NOTES IN WHITE PRINT The other is information to make you more intelligent about erosion…and know some cool facts to share with others!!. Erosion.

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Activating Strategy

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  1. Activating Strategy Study Jams Video Breaker and Whoosh JUST WRITE THE NOTES IN WHITE PRINT The other is information to make you more intelligent about erosion…and know some cool facts to share with others!!

  2. Erosion • Process by which soil and sediment are transported from one location to another

  3. Erosion by Gravity p. 359-361

  4. Open the flapTop half: Notes • Gravity is the force that moves rock and other materials downhill.

  5. Mass movement can be fast or S L O W .

  6. Examples • Landslides • Mudflows • Slump • Creep

  7. Landslide Sycamore Canyon LaConchita

  8. Las Colinas (view from the top)

  9. Las Colinas (large view)

  10. Mudflows Mount St. Helens

  11. Slump

  12. Creep

  13. Bottom Half:Picture • Now illustrate erosion by gravity • One giant scene with the examples of erosion by gravity

  14. What if… What if you could buy a mountain home near a river or on the waterfront?

  15. Things you should know before buying a waterfront propertyWhat do you think??? Pros: • good view, • use of beach • boat docking Cons: • could have restrictions on use of the beach with protected plants and animals • flooding • high insurance costs

  16. Things you should know before buying a mountain home… • Pros: • High property value because of the beauty of the land • mineral rights (you might find minerals on the mountain and can make profit from them • Cons: • Ice and snow can cause problems trying to get around • small creeks can flood and cause erosion • might not have access to electricity, internet, sewage systems, etc.

  17. Erosion by Water p. 308-314

  18. Top Half:Notes • Moving water is the major agent of erosion that has shaped the Earth’s land surface

  19. Bottom Half:Picture • Now illustrate erosion by water • One giant scene with the examples of erosion by water

  20. Website for more information http://www.geolsoc.org.uk/gsl/education/resources/rockcycle/page3462.html

  21. These two photos were taken from the same place 63 years apart. How are they alike? How are they different? 1941 2004

  22. Ag Upsala Glacier, South America

  23. Grinnell Glacier, Montana • 1935 • 2005

  24. South Cascade Glacier, Washington

  25. Erosion by Ice • A glacier is a huge mass of ice and snow that moves over land. It erodes and deposits large amounts of rock material. • p. 352-356

  26. How glaciers form • Over time, the weight of the snow packs the snow and forms a giant mass of ice. • Gravity causes them to flow slowly like a “river of ice”

  27. Glacier ice is the largest reservoir of fresh water on the planet, storing an estimated 75 percent of the world’s supply

  28. A glacier can range in length from the equivalent of a football field to more than 100 miles.

  29. The Antarctic ice sheet is actually a glacier. If it were to melt, sea levels would rise 210 feet

  30. Though it sits on the equator, Mount Kilimanjaro is glaciated

  31. A single glacier ice crystal can grow to be as large as a baseball

  32. Mountain valleys are typically “V” shaped before being taken oven by a glacier; during glaciation, the valley widens and deepens and becomes “U” shaped.

  33. Alaska is estimated to have more than 100,000 glaciers. Most remain unnamed.

  34. Erosion by Wind • Wind carries and deposits sediment. • Deserts, coastlines, and areas with little plant coverage are the most affected by wind erosion.

  35. Sand Dunes Piles of sand deposited by wind - Leeward side has a steeper slope What do you see in the picture that is helping to slow down erosion? leeward leeward windward

  36. ….at the beach • How did humans slow down erosion in this picture?

  37. ….in the desert

  38. Barchan dunes of the Namib Desert Crescent shaped dunes formed from a unidirectional (one-direction) wind.

  39. Hueco Bolson Desert – Texas Ripple marks are miniature dunes within a dune formed by crosswinds (not more than 2 inches tall). They appear to be traveling in a different direction than the large dune.

  40. The Dust Bowl of the 1930s

  41. Rock formations in the Wadi Desert in Egypt

  42. Arches National Canyon, Utah Rock Arches --formed when wind and water weather (erode) softer material first.

  43. Mt. Falconer - Canada Ventifact—formed when wind carries fine particles that work like a sand blaster (i.e. sand, silt, clay, and ice particles)

  44. Desert pavement Deflation--formed in arid environments when wind carries finer, more lightweight particles such as sand away; large particles are left behind and protect from further erosion

  45. Loess Deposits - Banks, Pennsylvania Yellowish, fine grained silt and clay sized particles formed by glaciers millions of years ago; carried and deposited by wind

  46. Pedestal rockAfrica What caused the rock to look like this?? Base of a rock is weathered and eroded more quickly due to abrasion (sand blasting) Wind could only pick up sand grains a couple of feet.

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