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earthquakes
n/a
7
Science
6th Grade
10/02/2009

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Term
stress
Definition
a force that acts on rock to change its shape or volume.
Term
tension
Definition
stress that stretches rock so that it becomes thinner in the middle.
Term
compression
Definition
stress that squeezes rock until its folds or bends.
Term
shearing
Definition
sress that pushes masses of rock in oppisite directions,in a sideways movement
Term
normal fault
Definition
a type of fault where the hanging wall slides,caused by tension in the crust.
Term
hanging wall
Definition
a block of rock that forms the upper half of the fault.
Term
footwall
Definition
the block of rock that forms the lower half of a fault
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