6th grade Ch. 2 Sec. 1 Earth's Crust in Motion

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6th grade Ch. 2 Sec. 1 Earth's Crust in Motion

  1. 1. Ch. 2 Sec. 1 Forces in Earth’s Crust
  2. 2. stress <ul><li>force that acts on rock to change its shape or volume </li></ul>
  3. 3. YouTube video-Bill Nye Stress 3 types of stress shearing tension compression pushes rock in opposite directions pulls on crust stretches rock so that it becomes thinner in the middle squeezes rock until it folds or breaks
  4. 4. 3 types of faults strike-slip normal reverse caused by shearing caused by tension caused by compression
  5. 5. Demonstrating Compression Waves <ul><li>Materials: Slinky </li></ul><ul><li>Two students hold the Slinky at the 2 ends pulling & stretching it slightly. </li></ul><ul><li>One student pushes the Slinky, slowly watching the Compression wave as it rolls from one end of the Slinky to the other. </li></ul>
  6. 6. In a normal fault hanging wall footwall hanging wall lies above / footwall lies below
  7. 7. Animation of a reverse fault footwall hanging wall
  8. 8. What kind of fault is this? strike-slip fault
  9. 9. San Andreas fault Example of a strike-slip fault
  10. 10. fault-block mountain <ul><li>mountain formed when normal faults uplift a block of rock </li></ul>Sierra-Nevada mountain range
  11. 11. fault-block mountain
  12. 12. Mountains formed by folding <ul><li>Folded Mountains </li></ul><ul><li>fold = </li></ul><ul><li>bend in rock that forms when compression shortens & thickens part of Earth’s crust </li></ul>
  13. 13. a nticline <ul><li>fold in rock layers that forms an a rch </li></ul>
  14. 14. syncline <ul><ul><li>fold in rock layers that bends down to form a bowl </li></ul></ul>
  15. 15. Anticline & syncline
  16. 16. Anticline & syncline
  17. 17. plateau = large area of flat land elevated high above sea level
  18. 18. <ul><li>The Colorado Plateau is a 150,000 square mile region covering parts of Arizona, Utah, Colorado, and New Mexico. </li></ul>
  19. 19. Let's Review
  20. 20. syncline <ul><ul><li>What is a fold in rock layers that bends down to form a bowl ? </li></ul></ul>YES NO
  21. 21. syncline NEXT
  22. 22. syncline NEXT
  23. 23. fold What is a bend in rock that forms when compression shortens & thickens part of Earth’s crust ? YES NO
  24. 24. A fold is a bend in rock that forms when compression shortens & thickens part of Earth’s crust . NEXT
  25. 25. NEXT A fold is a bend in rock that forms when compression shortens & thickens part of Earth’s crust .
  26. 26. fault-block mountain <ul><li>What is a mountain formed when normal faults uplift a block of rock ? </li></ul>Sierra-Nevada mountain range YES NO
  27. 27. NEXT
  28. 28. NEXT
  29. 29. a nticline <ul><li>What is a fold in rock layers that forms an a rch ? </li></ul>YES NO
  30. 30. NEXT
  31. 31. NEXT
  32. 32. <ul><li>In a _____________ </li></ul><ul><li>fault, the rocks on either side of the fault slip past each other sideways. </li></ul>YES NO
  33. 33. <ul><li>In a strike-slip fault , the rocks on either side of the fault slip past each other sideways. </li></ul>NEXT
  34. 34. NEXT
  35. 35. shearing tension compression YES NO What are the 3 types of stress ?
  36. 36. <ul><li>The 3 types of stress are shearing, tension and compression . </li></ul>NEXT
  37. 37. <ul><li>The 3 types of stress are shearing, tension and compression. </li></ul>NEXT
  38. 38. tension <ul><li>What type of stress pulls on the crust, stretching the rock so that it becomes thinner in the middle ? </li></ul>YES NO
  39. 39. NEXT
  40. 40. NEXT
  41. 41. B. shearing <ul><li>What type of stress pushes rock in opposite directions? </li></ul>A. tension YES NO
  42. 42. NEXT
  43. 43. NEXT
  44. 44. <ul><li>What are the 3 types of faults? </li></ul><ul><li>strike-slip </li></ul><ul><li>normal </li></ul><ul><li>reverse </li></ul>YES NO
  45. 45. NEXT
  46. 46. NEXT
  47. 47. What type of fault is caused by shearing? <ul><li>Strike-slip </li></ul><ul><li>Normal </li></ul><ul><li>Reverse </li></ul><ul><li>Fault-block </li></ul>YES NO
  48. 48. THE END
  49. 49. THE END

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