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Earthquake Activity

Mr. Smith's 6th grade Science

QuestionAnswer
huge cracks in the earth's crust fault
point where the earthquake starts, the place where the rocks begin to slide past each other focus
vibrations that travel through the crust seismic waves
the point directly above the focus on the earth's crust epicenter
these continue the damage and shaking of an earthquake aftershocks
the first waves to reach a faraway location after and earthquake in an accordion-like motion primary waves or P waves
the second waves to reach a faraway location moving in an up and down motion secondary waves or S waves
what is used to study the pattern of waves of an earthquake seismograph
a third type of shaking that occurs in and up and down and side to side motion, tearing apart buildings surface waves
Where do most earthquakes occur? edges of the plates where the plates meet
On which plate do most of the earthquakes happen? edges of the Pacific plate
Which type of wave is felt/happens first? Primary wave
the amount of energy released by an earthquake magnitude
What is the name of the scale used to show how strong an earthquake was? Richter
sudden trembling of the ground earthquake
Why do most earthquakes occur? the edges of the plates are trying to move past each other along a fault
Created by: mtoutant
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