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7th grade Ch. 2 Sec. 1 Earth's Crust in Motion
 

7th grade Ch. 2 Sec. 1 Earth's Crust in Motion

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    7th grade Ch. 2 Sec. 1 Earth's Crust in Motion 7th grade Ch. 2 Sec. 1 Earth's Crust in Motion Presentation Transcript

    • Ch. 2 Sec. 1 Forces in Earth’s Crust
    • stress
      • force that acts on rock to change its shape or volume
    • 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
    • 3 types of faults strike-slip normal reverse caused by shearing caused by tension caused by compression
    • Demonstrating Compression Waves
      • Materials: Slinky
      • Two students hold the Slinky at the 2 ends pulling & stretching it slightly.
      • One student pushes the Slinky, slowly watching the Compression wave as it rolls from one end of the Slinky to the other.
    • In a normal fault hanging wall footwall hanging wall lies above / footwall lies below
    • Animation of a reverse fault footwall hanging wall
    • What kind of fault is this? strike-slip fault
    • San Andreas fault Example of a strike-slip fault
    • fault-block mountain
      • mountain formed when normal faults uplift a block of rock
      Sierra-Nevada mountain range
    • fault-block mountain
    • Mountains formed by folding
      • Folded Mountains
      • fold =
      • bend in rock that forms when compression shortens & thickens part of Earth’s crust
    • a nticline
      • fold in rock layers that forms an a rch
    • syncline
        • fold in rock layers that bends down to form a bowl
    • Anticline & syncline
    • Anticline & syncline
    • plateau = large area of flat land elevated high above sea level
      • The Colorado Plateau is a 150,000 square mile region covering parts of Arizona, Utah, Colorado, and New Mexico.
    • Let's Review
    • syncline
        • What is a fold in rock layers that bends down to form a bowl ?
      YES NO
    • syncline NEXT
    • syncline NEXT
    • fold What is a bend in rock that forms when compression shortens & thickens part of Earth’s crust ? YES NO
    • A fold is a bend in rock that forms when compression shortens & thickens part of Earth’s crust . NEXT
    • NEXT A fold is a bend in rock that forms when compression shortens & thickens part of Earth’s crust .
    • fault-block mountain
      • What is a mountain formed when normal faults uplift a block of rock ?
      Sierra-Nevada mountain range YES NO
    • NEXT
    • NEXT
    • a nticline
      • What is a fold in rock layers that forms an a rch ?
      YES NO
    • NEXT
    • NEXT
      • In a _____________
      • fault, the rocks on either side of the fault slip past each other sideways.
      YES NO
      • In a strike-slip fault , the rocks on either side of the fault slip past each other sideways.
      NEXT
    • NEXT
    • shearing tension compression YES NO What are the 3 types of stress ?
      • The 3 types of stress are shearing, tension and compression .
      NEXT
      • The 3 types of stress are shearing, tension and compression.
      NEXT
    • tension
      • What type of stress pulls on the crust, stretching the rock so that it becomes thinner in the middle ?
      YES NO
    • NEXT
    • NEXT
    • B. shearing
      • What type of stress pushes rock in opposite directions?
      A. tension YES NO
    • NEXT
    • NEXT
      • What are the 3 types of faults?
      • strike-slip
      • normal
      • reverse
      YES NO
    • NEXT
    • NEXT
    • What type of fault is caused by shearing?
      • Strike-slip
      • Normal
      • Reverse
      • Fault-block
      YES NO
    • THE END
    • THE END