Unformatted text preview: 6.) Most earthquakes take place in the circum-pacific belt. 7.) The geothermal gradient is Earth’s temperature increase with depth. 8.) The seismic discontinuity at the base of the crust is known as the Moho. 9.) The phenomenon in which seismic waves change their direction of travel when they move through materials that have different properties is known as refraction....
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- Spring '08
- Geology, Seismic wave, Seismic Sea Wave, damaging earthquakes, earthquakes epicenter, circumpacific belt