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33 Cards in this Set
- Front
- Back
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type of stress:
compression |
plate boundary: convergent
fault: reverse example: Himalays (mountains) |
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type of stress:
tensional |
plate boundary: divergent
fault type: normal example: mid-atlantic ridge |
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type of stress:
shearing |
plate boundary:Transform
fault type: strike-slip example: San Andreas Fault |
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put a fold pic here! label it!
What type of stress causes folding? |
1. Anticline
2. sincline |
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An earthquake is:
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the release of stored energy in between plates
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This force holds plates/faults together and stops them from slipping
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Friction
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All earthquake waves are called
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siesmic waves
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Name the two different types of siesmic waves
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Body waves and surface waves
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_____ - waves arrive first because they travel _________ than ____-waves, which arrive second.
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P
faster S second |
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Define:
Focus |
The point that the earthquake starts at underground
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Define:
Epicenter |
Starting point of earthquake
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Matching: Use P, S, or L wave
Secondary |
S
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Matching: Use P, S, or L wave
Primary |
P
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Matching: Use P, S, or L wave
Surface |
L
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Matching: Use P, S, or L wave
Compressional |
S
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Matching: Use P, S, or L wave
Snake-like |
S
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Matching: Use P, S, or L wave
(place image f here) |
L
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Matching: Use P, S, or L wave
(place image g here) |
P
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Matching: Use P, S, or L wave
(place image h here) |
L
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_____ waves can travel through the earth's layers
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Body
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____-waves can travel through solids and liquids, whereas ____-waves can ONLY travel through solids.
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P
S |
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As the density of the material increases, the speed of the wave ________.
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increases
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When P waves reach the outer core, the ___________ because the outer core is made of _______.
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slow down
liquid |
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The area that does not receive seismic waves is called the _______ zone.
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shadow
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As P and S waves travel farther from the epicenter, their arrival times become <closer/farther> apart. (pick one)
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farther apart
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Which layer of the Earth causes the shadow zone
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the core
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The first waves to arrive at the seismic station are _____ because they are ________.
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P
fastest |
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The Richter scale measures the _________ of an earthquake.
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magnitude
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The Mercalli scale measures the _______ of an earthquake.
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intensity
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Use your time-travel graph to answer the following questions:
How long does it take for a P wave to travel 4000 km? |
7 min
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Use your time-travel graph to answer the following questions:
How long does it take for an S wave to travel 5000 km? |
15
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Use your time-travel graph to answer the following questions:
If an S-wave arrives 7 minutes after the earthquake, how far is it to the epicenter |
1900
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Use your time-travel graph to answer the following questions:
If the seismograph received P waves at 2:38 and the S-P lag time is 6 min 40 sec, at what time did the earthquake state? |
2:30
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