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earthquakes vocab

14 words to study

stress a force that acts on an area of rock to change its shape or volume
tension a type of stress that pulls on the crust
compression a type of stress that squeezes rock until it folds or breakes
shearing stress that pushes a mass of rock in two opposite directions
fault a break in the rock of the crust where rock surfaces slip past eachother.
earthquake the shaking that results from the sudden movement of rock along a fault
focus the area beneath earths surface where rock that is under stress breaks triggering an earthquake.
epicenter the point on the surface directly above the focus.
siesmic waves vibration that travel through earth carrying the energy released during an earthquake
magnitude a number that geologist assign to an earthquake based on the earthquake's size.
richer scale assigns a magnitude number to an earthquake based on the size of siesmic waves.
siesmograph an instroment that records and measures siesmic waves.
aftershocks an earthquake that occures after a larger earthquake in the same area.
tsunami earthquakes that form a large wave from the water.
Created by: alikat