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28 Cards in this Set
- Front
- Back
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scientist who studies the earth
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Geologist
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the Earth's solid, rocky surface containing the contients and the ocean floor
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crust
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the idea that many kinds of rocks form, flat and horizontal layers
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original horizontally
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the idea that contients slowly separated from a single land mass to their present locations
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continental driff
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the idea that new crust is formed at the ridges of mid-ocean ridges in the sea floor
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sea-floor spreading
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the melted rock that exists just below the earth's surface
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magma
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the idea that the earth's surface is broken into plates that move
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plate tectonics
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the Earth's layer beneath the crust
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mantle
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one plate slides below another during a collison
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subduction
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a huge crack in the crust at or below the surface
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faults
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the point where earthquakes starts where rocks begin to slide past each other
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focus
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a vibration that spreads out away from a focus when an earthquake happens
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seismic waves
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the point on the earth's surface directly above the focus
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epicenter
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the shaking of the crust after the inital shaking of the earthquake
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aftershock
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a sensitive device that detects the shaking of the crust
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seismograph
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the amout of energy released by an earthquake
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magnitude
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the central opening in a volcanic area through which magma may escape
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vent
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magma that reaches Earth's surface and flows at the top of a volcano around the vent
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lava
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a cup-like hollow that forms at the top of a volcano around the vent
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crater
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a very hot part of the mantle, where magma can melt through a plate moving above it
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hot spots
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heat from below the earth's surface
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geothermal energy
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a sensitive device that detects the shaking of the crust
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seismograph
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the amout of energy released by an earthquake
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magnitude
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the central opening in a volcanic area through which magma may escape
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vent
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magma that reaches Earth's surface and flows at the top of a volcano around the vent
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lava
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a cup-like hollow that forms at the top of a volcano around the vent
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crater
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a very hot part of the mantle, where magma can melt through a plate moving above it
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hot spots
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heat from below the earth's surface
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geothermal energy
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