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Sarah And Shontell Folder4



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  • 1. By Shontell Roberts and Sarah Keith Core 1,Science Earthquakes For Kidz
  • 2. Stress
    • There are three different kinds of stress can occur in the crust- tension, compression, and shearing.
    • These forces cause some rocks to become brittle and snap.
    • Other rocks bend slowly like road tar softened by the sun.
  • 3. Compression
    • The stress force called compression squeezes rock until it folds or breaks
    • One plate pushing against another can compress rock like a giant trash contractor.
  • 4. Tension
    • The stress force called tension pulls on the crust, stretching, rocks so that it becomes thinner in the middle
    • The effect of tension on rock is somewhat like pulling apart a piece of warm bubblegum.
  • 5. Shearing
    • Stress that pushes a mass or rock in to opposite direction is called shearing
    • Shearing can cause rock to break and slip apart or to change its shape.
  • 6. Reverse Faults
    • Reverse faults are in places where the rock of the crust is pushed together compression cause’s reverse faults to form
    • A reverse fault has the same structure as a normal fault, but the blocks move in the opposite direction.
  • 7. Strike-Strip Fault
    • In places where plates move past each other shearing creates strike-slip faults
    • In a strike-strip fault other rocks on either side of the fault slip past each other sideways with little up or down motion.
  • 8. Normal Faults
    • Is when tension in the crust pulls the rock apart causing normal faults
    • Normal faults have a footwall and a hangwall most faults occur along boundaries.
  • 9. Hang wall
    • The hang wall is the block of rock that lies below the footwall like a fault
    • A hang wall happens when they move away from each other
  • 10. Anticline
    • A fold in rock that bends upward into an arch.
    • Like going up a mountain.
  • 11. Footwall
    • When movement occurs the normal fault move downwards .
    • This happens when two pieces of earths crust are under tension.
  • 12. Syncline
    • A fold in rock that bends down to form a valley.
    • Like going down a hill or valley.
  • 13. Plateau
    • Plateau is a large area of flat land elevated high above sea level.
    • Flat land with mostly grass and few trees.
  • 14. Internet Sources
    • www. images. Google/pictures