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Chap1 Sec2

Changes within the Earth

QuestionAnswer
Core The center of Earth. Consists of very hot metal that is dense and solid
mantle A thick layer of mostly solid rock beneath the earth's crust that surrounds the earth's core
crust The solid, rocky, surface layer of the earth
relief The differences in elevation, or height, of the landforms in any particular area
plate tectonics The theory that the earth's outer shell is composed of a number of large, unanchored plates, or slabs of rock, whose constant movement explains earthquakes and volcanic activity
continental drift theory The idea that continents slowly shift their positions due to movement of the tectonic plates on which they ride
Pangaea Hypothetical supercontinent that included all land masses of the Earth.
San Andreas Fault 750 mile fault line in California. The boundary of the North American Plate and the Pacific Plate. Source of many earthquakes.
subduction One plate slides or dives under another
spreading Two plates move apart from each other, creating a rift in the earth's crust
converging When two plates collide and push slowly against each other
faulting Plates grind or slide past each other, rather than collide
Created by: mrsbbaum