26 terms

geography

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core
the inner most layer of the earth.
mantle
thick middle layer of the earth interior structure
magma
molten rock that is pushed up from earths mantle
plate tectonics
term used to describe th activities of the plates
continental drift
continents are moving away from each other and were onece joined. .
rift valleys
a crack in the earths surface created by shifting
continental shelves
the part of a continent that extends underwater
trench
valley under water caused by subduction
folds
a bend in layersof rock caused by plate movement.
faults
a crack in the earths crust
weathering
chemical or physical, breaks down the rocks
erosion
wearing away of the earths surface by wind, flowing water or glaciers
glaciers
large body of ice that moves across the surface of the earth
depostion
when sediment/ particles transported by erosion fall out of the transporting medium( water, wind) and settle to a surface
geology
the study of earths physical structure and history
ring of fire
A major belt of volcanoes that rims the Pacific Ocean
crust
Earth's outermost layer.
subduction
One plate going under another plate
converging
Plates moving toward each other. At convergent boundaries you will find subduction, mountains, and trenches.
spreading
A process by which new land is created when sea plates pull apart and magma wells up between the plates
relif
The physical configuration of the earths surface, depicted on a topographic may by contour lines and spot heights
mid-ocean range
the place were plates of earth's crust along the ocean floor are being split apart and molten rock pushes to form new ocean floor and a mountain range
accretion
An increase in land resulting from the deposit of soil by the water.
moraines
A mound, ridge, or mass of material that were left on the ground by a receding glacier.
lithoshere
the cool outer outer crust and upper part of the mantel of the earth
alluvial plain
area that is built up by rich fertile soil left by river floods