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Seitz Geology

Geology and Rocks

TermDefinition
crust The outer layer of the Earth.
mantle A thick layer of rock between the crust and the core of the Earth.
Metamorphic A type of rock that forms from existing rocks because of changes caused by heat, pressure, and chemicals.
Erosion The wearing away or removing of rock and soil caused by such forces as wind and flowing water.
Fossil The remainsor traces of a living thing from the past that has been preserved in rock.
Plate Tectonics The movement of the plates which make up the Earth's crust.
Igneous A type of rock that forms from melted rock that cools and hardens.
Magma Hot, melted rock located below the Earth's crust.
Lava The name given to magma that comes up through the openings of the Earth's crust.
Core The innermost layer of the Earth, which consists of molten outer part and a solid inner part,
Rock Cycle The continuous series of changes that rocks undergo (weathering, melting, cooling, and pressure)
Deposition The falling out of eroded soil as it settles on a surface.
Volcano Any openings in the Earth's crust through which hot gases, rocks, and melted material erupt.
Earthquake Shaking or trembling of a portion of the Earth caused by movement of rock masses or by volcanic shake.
Sedimentary A type of rock that forms when sediments by such forces as wind, rain, and sunlight.
Divergent Two plates moving apart.
Transform Two plates slide against each other in opposite directions.
Convergent Two plates come together, one sliding under the other or both rising up.
Inner Core An 800 miles thick ball of solid iron and nickel. Temperatures and pressure are amazing.
Outer Core 1400 miles thick and extremely hot. It is so hot that nickel and iron found there are melted into a liquid state like pudding.
Weathering Breaking down of rocks into sediments by such forces as wind, rain, and sunlight.
Created by: Seitz
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