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Earthquakes

Gr.8 - Ch. 6 Earthquakes

QuestionAnswer
What type of force is exerted on a rope when a rock climber rappels down a cliff? Tension
What type of force is exerted as a rock strikes a roadway after tumbling down a hill? Compression
What type of force is it when two layers of rock slide across each other during a mudslide? Shear
What type of force is it when a rock rolls along the bottom of a raging river? Erosion
At what type of boundary does subduction occur? Convergent
What type of boundary do plate sections moves apart? Divergent
What type of boundary do plate sections come together? Convergent
What type of boundary do plate sections slide by each other in opposite directions? Transform
What is the longest strike-slip fault in southern California? San Andreas Fault
What are smaller, secondary earthquakes that occur after a major earthquake? Aftershocks
Where are most major faults found in the United States? Mountain Ranges
What are two types of dip-slip faults? Normal and Reverse
What is a rock that forms a crack but no visible movement is present? Joint
What is a rock that forms a crack with visible movement present? Fault
What type of seismic wave travels through Earth's core? P-Waves
What type of body (seismic) wave is the fastest and reaches a seismic station first? P-Waves
What type of seismic wave causes the most damage? Surface Waves
What type of body (seismic) wave can't travel through Earth's core? S-Waves
What type of seismic wave reaches a seismic station second? S-Waves
What type of seismic wave reaches a seismic station last? Surface Waves
What angular measurement is found on the horizontal plane as it relates to the compass direction of North? Strike
What angular measurement is of the fault downward from the horizontal? Dip
What are two types of surface waves? Rayleigh and Love
What is the center of the earthquake at the surface? Epicenter
What is the center of the earthquake below the surface? Focus
If an earthquake's focus is close to the surface is it stronger or weaker? Stronger
What is an ocean wave caused by an earthquake? Tsunami
One quake measures 4.0 and another quake measures 5.0 on the Richter scale. How much more strength is occurring? 32 times more
What is a series of low-frequency shock waves traveling through the earth? Earthquake
What is a geologist who studies earth's movements and the structure of its interior? Seismologist
How many seismic stations are needed to determine the center of an earthquake? Three
What type of fault is at a transform boundary? Strike-Slip
What is the fastest body (seismic) wave? P-Wave
What scale is used to express an earthquake's magnitude? Richter Scale
What scale is used to express how much damage is caused by an earthquake? Mercalli Scale
What is the limit of the Richter Scale? No Limit
Created by: kpmueller
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