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30 Cards in this Set
- Front
- Back
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Lithosphere |
outer solid region of the earth that includes the crust and very upper mantle
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Asthenosphere |
upper mantle region of the earth, below the lithosphere |
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Continental Crust |
-40% of the earths surface -thickness 35-40 km -density 2.7 g/cm |
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Oceanic Crust |
-60% of the earths surface -thickness 5-10 km -density 30g/cm |
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Mantle |
-thick layer of rocky materials -67% of the earths mass -depth 1800 miles |
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Outer Core |
-made of iron and nickel -all molten liquid -magnetic |
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Inner Core |
-high pressure=solid iron -hot ! |
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Mohorovicic Discontinuity |
the moho is the boundary between the crust and the mantle |
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Iron |
the element Fe |
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Convection Current |
a current in a fluid that results from convection |
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Density |
mass per unit volume |
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Paleomagnetism |
the study of the record of the Earth's magnetic field in rocks
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Magnetic Poles |
the regions of a magnet that attracts or repels other magnetic objects |
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Dynamo Process |
the earths magnetism thats generated by electrical currents in the outer iron core |
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Convergent Boundary |
the region where two tectonic plates collide |
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Divergent Boundary |
the region where two tectonic plates move away from each other |
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Transform Boundary |
the region where two plate tectonics slide past each other in seperate directions |
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Earthquake |
the movement of plate tectonics causing the earth to shake and/or form or destroy land |
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Volcano |
when hot gases or liquids erupt from the earths crust because of convection |
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Mountain Range |
a line of mountains connected by high ground |
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Trench |
a long, narrow ditch |
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Rift Valley |
a long narrow valley that lies in between two faults |
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Mid-Ocean Ridge |
an underwater mountain range |
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Abraham Ortelius |
though that all the continents were once connected |
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Eduard Suess |
discovered an ancient continent called Gondwanaland |
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Alfred Wegener |
created the Continental Drift theory |
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Theory of Continental Drift |
the theory that all of the continents were joined together as one subcontinent called Pangea |
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Harry Hess |
presented the theory of seafloor spreading |
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Seafloor Spreading |
new crust being formed at mid-ocean ridges and old crust being destroyed at oceanic trenches |
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Laws of Thermodynamics |
the laws define the fundamentals like temp and energy |
