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Chapter 4 Vocabulary

Core Earth's center
Mantle The zone that has most of Earth's mass.
magma Liquid rock within Earth.
Plate Tectonics The theory that Earth's crust is divided into plates that slowly move across the upper mantle.
Rift Valleys 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.
Continental Shelves Areas where continetal surfaces extend under the swallow ocean water around the continents.
Trench A deep valley making a collinson of plates,where one plate slides under another.
Folds Places where rocks have been compossed into bends by colliding plates.
Faults Places where rock masses have been broken apart and are moving away from each other.
Weathering The process by which rocks break and decay over time.
Sediment Small particles of whathered rock.
Erosion Movement of surface material from one location to another by water,wind, and rice.
Glaciers Thick masses of ice,including great ice sheets and bodies of ice that flow down mountains like slow rivers.
Plateu An elevated flatland that rises sharply above nearby land on at least one side.
Alluvial Fan Fan-shaped deposit of mud and gravel often found along the bases of mountains.
Delta Accumulation of sediment at the mouth of a river.
Created by: josealfaro



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