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19 Cards in this Set
- Front
- Back
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Elemental composition of the Earth |
Iron 35%, Oxygen 30%, Silicon 15%, Magnesium 10% |
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Makes up most rock |
Silicate SiO2 |
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Rate of change in temp with depth in Earth |
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Using Earthquake waves to see inside Earth |
Seismology |
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First wave in an earthquake |
P Wave |
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Similar to soundwaves, pushes and pulls |
P Wave |
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Travels through rock and liquids |
P Wave |
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Arrives later than P waves |
S Wave |
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Shears rock sideways or up and down |
S Wave |
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Only travels through solids |
S Wave |
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Used to show direction and speed of waves |
Rays |
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Waves do this when crossing different densities in earth |
Reflect or Refract |
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Dependent on elasticity and density of rock |
Wave Speed |
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Crust/Mantle boundary - abrupt increase in P Wave speed |
Moho |
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Abrupt decrease in wave speed |
Core-Mantle Boundary |
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Secondary abrupt increase in wave speed |
Outer-to-Inner Core Boundar |
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Created by S-wave inability to pass through core |
Shadow Zone |
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Details variations in seismic velocity ofmaterials within the Earth |
Seismic Tomography |
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Generated by motion in the liquid outer core, deflects solar wind |
Magnetic Field |
