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chapter 4 vocabualry

TermDefinition
Core Earth's center, where pressures and temperatures are very high
Mantle The section of Earth's interior that lies above the outer core and has the most mass
Plate tectonics The theory that earth's crust is divided into rigid plates that slowly move across the upper mantle.
Continental drift The process by which earth's plates slowly move across the upper mantle.
rift valley places on earth's surface where the crust stretches until it breaks.
abyssal plains Areas of the ocean floor where rocks gradually sink because they have no supporting heat below them;the world's flattest and smoothest regions,
continental shelves Areas where continental surfaces extend under the shallow ocean water around the continents.
trench a deep valley marking a collision of plates, where one plates slides under another.
folds places where rocks have been compressed into bends by colliding plates.
faults Places where rocks masses have been broken apart and moving away from each other.
weathering the process by which rocks break and decay over time.
sediment small particles of weathered rock
erosion Movement of surface material from one location to another by water, wind, and ice.
glaciers Thick masses of ice, including great ice sheets and bodies of ice that flow down mountains like slow rivers.
plateau An elevated flatlands that rises sharply above nearby land on at least one side
alluvial fan Fan-shaped deposit of mud and gravel often alng the bases of mountains.
delta Accumulation sediments at the mouth of a river.
Created by: hannsmith