APES Unit 4 Vocab
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9 Terms
Plate tectonics
The theory explaining the structure of the Earth's crust and many associated phenomena.
Soil horizons
Layers of soil that differ in color and composition.
Weathering
The breaking down of rocks and minerals by various factors including water, wind, and biological activity.
Erosion
The process by which soil and rock are removed from the Earth's surface by wind or water flow.
Watershed
An area of land that separates waters flowing to different rivers, basins, or seas.
Aquifer
An underground layer of water-bearing rock.
El Niño
A climate pattern that describes the unusual warming of surface waters in the eastern tropical Pacific Ocean.
La Niña
A climate pattern that describes the cooling of surface ocean waters along the tropical west coast of South America.
Atmospheric layers
The layers of gases surrounding Earth, including the troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
Note 
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