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sci.quiz1-28-09
Science Quiz on Earthquakes 1-28-09
Question | Answer |
---|---|
earthquake | the shaking that results from the movement of rock beneath earths surface. |
stress | a force that acts on rock to change its shape or volume |
shearing | stress that pushes a mass of rock in opposite directions |
tension | stress that stretches rock so that it becomes thinner in the middle |
compression | stress that squeezes rock until it folds or breaks |
deformation | a change in the volume or shape of earths crest |
fault | a break in earths crust where slabs of rock slip past each other |
strike-slip fault | a type of fault where rocks on either side move past each other sideways with little up or down motion |
normal fault | a type of fault where he hanging wall slides downward; caused by tension in the crust |
hanging wall | the block of rock that forms the upper half of a fault |