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29 Cards in this Set
- Front
- Back
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crust
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earths soild rocky suface containing the continents and oceans
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original horizontalily
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the idea of many kinds of rocks formed in flat horizantal layers
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continental drift
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the idea that all the contenints were toghether and then spilt apart from each other.
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sea-floor spreading
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the idea the new crust is forming at sea ridges on the sea floor
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magma
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hot melted rock beneath the earths surface.
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plate techtonics
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the idea that earths surface is broke up into plates that move
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mantel
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Earth's layer beneath the crust
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subduction
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where plates collide the sliding of a dencer ocean plate under another plate
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fault
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a huge crack in the crust at or below the surface of the sides of which may show evidence of motion
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seismic wave
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a vibration that spreads out away from the foucus
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epicenter
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the point on earth where diecetly above the focus
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aftershock
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shake of the crust after the first shaking
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seismograph
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a sencitive device that finds shaking of the crust
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magnitude
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the amout of energy released by an earthquake
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hot spot
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a very hot part of the mantel where magma can melt
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vent
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the central opening in a volcano where magma can escape through
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lava
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magma when it reaches the surface and goews out of the vent
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crater
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a cuplike hollow that forms at the top of volcanoes
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geotheremal engey
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heat from below earth surface
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active fault
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a crack in earths crust where earthquakes take place
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blind fault
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a fault that you can not see on the surface
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rain shadow
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when mountain block moist air from reaching areas around them
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dune
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a pile of sand made by wind
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shaded relief map
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a map the show high points and low points on a map by colors and shadows
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topographic map
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a map that shows things of earths surface as pattern of lines
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contour line
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a line the connects points of the same elevation
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map ledgend
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table of symbols used on a map
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map scale
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compares a distance on the map with the distance on earths suface
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geologic map
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a map that shows of rocks and postions of the rock
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