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Grade 6, Chapter 6

Grade 6, Chapter 6

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  • 1. Chapter 6 Plate Tectonics Inside the Earth Section 1
  • 2. Earth Layers
    • The Earth is divided into four main layers.
      • *Crust
      • *Mantle
      • *Core
  • 3. The Crust
    • * The Earth’s crust is like the skin of an apple. It is the outer most layer.
    • *The crust makes up 1% of the Earth.
    • * The crust of the Earth is broken into many pieces called plates.
  • 4. The Mantle
    • The mantle is the layer between the crust & the core.
    • The mantle is the largest layer of the Earth.
    • The mantle is divided into two regions: the upper and lower sections.
  • 5. Core
    • * The core extends from the bottom of the mantle to the center of the Earth.
    • * The outer core is liquid.
    • * The inner core is a solid.
  • 6. Asthenosphere
    • * Soft layer of the mantle on which pieces of the lithosphere move.
  • 7. Lithosphere
    • The outermost ridge layer of the Earth
  • 8. Mesosphere
    • Beneath the Asthenosphere is the strongest part of the mantle
  • 9. Outer Core
    • Liquid layer of the Earth’s core
  • 10. Inner Core
    • Solid dense center of our planet
  • 11. Tectonic Plates
    • Pieces of the lithoshpere that move around on the top of the asthenosphere
  • 12. Chapter 6 Plate Tectonics Restless Continents Section 2
  • 13. Continental Drift
    • Continents can drift apart from one another and have done so in the past
  • 14. The Break up of Pangea
    • 245 Million years ago
  • 15. Laurasia & Gondwana
    • 180 Million years ago
  • 16. North America, Eurasia, Africa, India, South America, Antarctica
    • 65 Million years ago
  • 17. Sea-floor spreading
    • How a new oceanic lithosphere is created as older materials are pulled away
  • 18. Sea-floor spreading
  • 19. Magnetic Reversal
    • Earth’s magnetic poles change positions
  • 20. Chapter 6 Plate Tectonics The theory of Plate Tectonics Section 3
  • 21. Plate Tectonics
    • Earth’s lithosphere is divided into tectonic plates that move around the top of the asthenosphere
  • 22. Ridge Push
    • Lithosphere is higher then it is where it sinks beneath the continental lithosphere
  • 23. Slab Pull
    • When an oceanic plate collides with the continental plate. The oceanic plate is forced into the asthenosphere
  • 24. Convection
    • Hotter material deep within the Earth rises while cooler material sinks
  • 25. Convergent Boundaries
    • When two tectonic plates push into one another
      • Continental/Continental Collisions
      • Continental/Oceanic Collusions
      • Oceanic/Oceanic Collusions
  • 26. Continental/Continental Collisions
    • When 2 tectonic plates with continental crust collide
  • 27. Continental/Oceanic Collusions
    • When a tectonic plate with continental crust crashes into a plate with oceanic plates
  • 28. Oceanic/Oceanic Collusions
    • When two oceanic plates collide
  • 29. Divergent Boundaries
    • When two tectonic plates move away from one another
      • Moving apart
  • 30. Moving Apart
    • Two tectonic plates move apart from each other
  • 31. Transform Boundaries
    • The boundary between two tectonic plates that slide past each other
      • Sliding Past
  • 32. Sliding Past
    • Two tectonic plates slide past each other
  • 33. Chapter 6 Plate Tectonics Deforming the Earth’s Crust Section 4
  • 34. Stress
    • The amount of force that is put on a given material
  • 35. Compression
    • The type of stress that occurs when an object is squeezed, when 2 tectonic plates collide
  • 36. Tension
    • Stress that occurs when forces act to stretch an object
  • 37. Folding
    • Rock layers bend due to compression of the Earth’s crust
      • Anticline
      • Syncline
      • Monocline
  • 38. Anticline
  • 39. Syncline
  • 40. Monocline
  • 41. Fault
    • The surface along which rocks break & slide past each other
  • 42. Normal Fault
    • The hanging wall moves down relative to the footwall
  • 43. Reverse Fault
    • The hanging wall moves up relative to the footwall
  • 44. Strike-slip Fault
    • Rocks break & move horizontally
  • 45. Folded Mountains
    • Rock layers are pushed upward
  • 46. Fault Block Mountains
    • Large blocks of the Earth’s crust drop relative to other blocks
  • 47. Volcanic Mountains
    • Form over the type of convergent boundaries that include subduction zones