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8th Geology

Geology: Plate Tectonics & Topography

TermDefinition
Subduction Occurs at converging plate boundaries; the process where one plate slides under another.
Tectonic Plate One of the pieces of the Earth’s rocky crust that rests and moves on the semi – liquid mantle.
Divergent Boundary The lithospheric plates are moving away from each other.
Convergent Boundary A boundary where two pieces of the Earth’s crust are colliding.
Transform Boundary The boundary between two tectonic plates that are sliding past one another.
Uplift When forces within the Earth push up a section of crust.
Rift Zone An area where two tectonic plates are moving away from one another.
Sea Floor Spreading New ocean floor is created at a mid – ocean ridge as two tectonic plates move away from one another.
Fault A crack within the Earth’s rocky crust.
Contour Lines On a map, a line that connects points of equal elevation above sea level.
Contour Interval The difference in elevation between any two contour lines on a topographic map.
Index Contour Lines A contour lines that is darker than nearby lines and has its elevation labeled.
Weathering The process of being broken apart by water, air, or ice.
Mechanical Weathering Changes in the size and shape of a rock.
Chemical Weathering A change in the materials that make up a rock.
Erosion The process of moving rock from place to place.
Topographic Map A map that shows the shape and elevation of the land surface using contour lines, and shows other land features.
Satellite Images Photographs made by means of artificial satellites.
Land Features Any naturally occurring landform located on Earth.
Created by: NEISDSci
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