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Ch. 9 Earthquakes

QuestionAnswer
What do seismologists commonly use to describe the magnitude of an earthquake? Richter Scale
What is one way to make your home seismic safe? Place heavy items on lower shelves
What is the greatest loss of life in an earthquake due to? structures built by people
What type of wave causes the greatest destruction during an earthquake? surface waves
How much more energy does an earthquake with a magnitude of 7.5 release than an earthquake with a magnitude of 6.5? 32 times more
What phase of matter do secondary waves not go through? liquid
What is the slowest seismic wave? secondary waves
What wave arrives at a seismograph station first? primary waves
When rocks break below the sea or ocean, the energy is released in what form? tsunami
What determines how far an epicenter is from a seismograph station? how far apart the p and s waves are
What waves cause rock particles to move up and down? Secondary waves
What waves cause rock particles to squeeze and compress? primary waves
What type of fault results from compression causing the rock to move upwards? reverse fault
What type of fault results from tension causing the rock to move downward? normal fault
What type of fault results from shear force causing the rocks to move side to side? strike-slip fault
What is the area between 105 and 140 degrees from an earthquake's focus where no seismic waves occur called? shadow zone
What is the boundary between the crust and the mantle called? Moho Dicontinuity
The San Andreas is an exmaple of what type of fault in California? strike-slip
What is the origin of an earthquake called? focus
What is the area called straight above the focus? epicenter
What is a person who studies earthquakes called? seismologist
Created by: erbrecht
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