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20 Cards in this Set
- Front
- Back
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Why doesn't the model of a geodynamo work to explain Earth's magnetic field?
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Because a geodynamo uses the magnetic field of magnet to produce electric current - Earth works the other way around
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Solenoid - Earth
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1. Outer core is LIQUID iron and nickel
2. Heat convection and world rotation makes liquid flow 3. friction between superheated metals creates electricity |
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What deforms the earth's magnetosphere?
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Solar wind deflected by earth's magnetic field
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What percentages of land and water make up the earth
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70 percent water
30 percent land |
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What are the two main gases that make up the atmosphere?
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Nitrogen (78%) and Oxygen (21%)
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Name the layers of the Earth.
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Inner Core, Outer Core, Mantle, Crust
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The rigid region of rock that makes up tectonic plates
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Lithosphere
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The boundary between the crust and the lithospheric mantle - NO GLIDING?
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MOHO
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Which is more dense, oceanic or continental crust?
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Oceanic crust
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What is the only liquid layer of the Earth?
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The Outer Core
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Which regions of the earth "flow"?
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Outer Core, Lower Mantle (VERY SLOWLY), Upper Mantle (very slowly -not including Lithosphere)
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What is the deepest cave in the world?
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Voronya Cave (Krubera)
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What is the deepest dig in the world?
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Bingham Canyon
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What is the deepest mine in the world?
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Savuka Mine, Tau Tona Mine
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What is the deepest drill hole in the world?
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Kola Peninsula, Russia
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Seismic waves
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sound waves caused by earthquakes
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How do we know that there is a Liquid core at earth's center?
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by the observance of seismic waves through the earth
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rocks brought to the surface by magma rising from the mantle
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mantle xenoliths
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Rock type found in the mantle
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Peridotite
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True or False: Lighter material sank towards center of earth, Heavier material rose to the top.
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False
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