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science plate tecton

science plate tectonics study stacks

QuestionAnswer
plate tectonics a theory that says that the earth's crust is broken into pieces that are in constant, slow motion
mid-ocean ridges undersea mountains formed when the sea-floor spreads and molten rock rises up out of the split
transform boundary where two plates slide past each other, moving in opposite directions
sedimentary rock rock formed from sediment that has been eroded from land and mountains, later pressed down underground
earthquake movement caused when friction between opposite sides of a fault is very high, the fault locks, and stress builds up
seismic waves energy waves that carry energy from an earthquake away from the focus point
convection currents when heat is transferred within a fluid or liquid
focus the point under the earth's surface where the actual movement of the earth (earthquake) started (or took place)
law of crosscutting relationships statement that says that a fault must always be younger that the rock layers that it cuts through
metamorphic rock rock that is changed from being exposed to the intense HEAT of the mantle
fossils preserved remains of plants and animals that used to live on earth, that gave rise to animals that exist today
mantle layer of hot rock where convection currents cause plates to move
convergent boundaries where two plates come together, mountains are most often pushed up
alluvial fan formed when sediment drops because a fast moving stream is slowed down (by flattening our, or coming into a body of water)
topographic map a map that shows mountains, by showing elevation and slope of the land
sonar a technology that uses sound waves to bounce off things, it was used to help map the mid-ocean ridges
satellite image a picture of part of the earth, which shows areas on the earth's surface in various colors, water as black, cities at blue-gray, etc.
Created by: 100001085767040
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