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19 Cards in this Set
- Front
- Back
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Trasform Plate Boundaries |
Plates slide past one another (fracture zones) |
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Example of a transform plate boundary |
St. Andreas Fault System |
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Description of transforming plate boundary |
-Deeper toward crust, hotter it gets -hot material rises through asthenosphere and it cools |
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Two Mechanisms of Plate Boundaries |
1. convection in asthenosphere (magma drives plate tectonics. ridge push) |
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Slab Pull |
Keeps it going like a conveyer belt |
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Volcanoes that aren't at tectonic boundaries |
hot spots (under continental crust) |
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Examples of Volcanoes that aren't at tectonic boundaries |
Hawaii and Galapagos |
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Earthquakes |
a vibrant of the earth due to the rapid release of energy usually due to slippage along a fault |
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why study earthquakes? four reasons |
1. Can devastate population centers 2. Learn about interior structure of earth 3. about 300,000 quakes/year that can be felt 4. about 75/year large enough to cause damage |
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Where do many volcanoes usually occur? |
Oceans and remote areas |
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Big Earthquakes have occurred in: |
California- Transoform PB Chile 1964- Ocean-Continent PB Alaska 1964- Ocean- Continent PB Japan- Ocean- Ocean continent PB Indonesia- Ocean- Ocean continent PB Turkey- Continent-Continent conversion PB |
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Focus |
Rupture where the earthquake occurs |
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Epicenter |
the surface above the focus
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seismology |
study of waves |
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energy waves(seismic waves) |
slinky going back and forth horizontal |
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P-Wave(primary/compression) |
-travel fastest -travel through solids and liquids -high frequency; low amplitude -ground notion is in the same direction as wave propagation |
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S-Wave(secondary/shear) |
-travels slower than p-wave -travels through solids only -lower frequency; higher amplitude than p-waves -ground notion is perpendicular to direction of wave propagation |
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surface waves |
-travels slowest -results in undulating ground motion -causes damage -perpendicular -low freq/high amp |
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Which is P, S, and Surface |
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