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Forces I nside Earth

Forces I nside Earth. Fault Formation. elastic limit= how far a rock will bend and stretch Elastic deformation= forces that cause rocks to bend and stretch out of shape Faults= when rocks are bent and stretched beyond the limit and break and move along surface can move up, down, or sideways.

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Forces I nside Earth

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  1. Forces Inside Earth

  2. Fault Formation • elastic limit= how far a rock will bend and stretch • Elastic deformation= forces that cause rocks to bend and stretch out of shape • Faults= when rocks are bent and stretched beyond the limit and break and move along surface can move up, down, or sideways

  3. Motion along Faults Causes Earthquakes • As rocks along a fault move, they catch on each other. • This causes rocks to stop moving, and stress builds up. • Rocks bend and stretch beyond elastic limit, they break, move along fault, and return to original shapes. An earthquake results from vibrations caused when rocks break.

  4. 3 Types of Forces

  5. 3 Types of Force • Tension  pulls rocks apart

  6. 3 Types of Force • Compression squeezes rock together

  7. 3 Types of Force • Shear Causes rocks on either side of the fault to slide past each other

  8. 3 Types of Faults

  9. 3 Types of Faults Normal • tension force pulls apart rocks • Rocks above the fault surface moves downward

  10. 3 Types of Faults Reverse • compression squeezes rocks • Rocks above the fault surface moves up & over

  11. 3 Types of Faults Strike-slip • Shear forces slide past without moving up or down • Rocks slide past each other in different directions

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