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9 Cards in this Set

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Inner Core
begins at a depth of 5150 km and has a diameter of 2600 km. The pressure is so great at this depth that matter exists as a solid even though the temperature is 5000ºC. The inner core consists of iron and nickel.
Outer Core
is directly below the mantle and begins at a depth of about 2900 km and is about 2250 km thick. In the traditional model it is believed to be made of liquid iron and nickel. The temperatures range between 2200ºC – 5000ºC. The pressure is tremendous but not great enough to make it solid.
Mantle
the layer directly below the crust and directly above the outer core. extends to a depth of 1900km, it makes up about 68% of the earth’s mass and 80% of it volume.
Moho
an imaginary line that exists on average at a depth of about 32km. It is found within the lithosphere and separates the crust from the mantle.
Plasticity
the ability for solids to flow
Crust
the outermost layer of the earth. It is very thin, like a peel on a fruit. is usually covered with soil or water. It consists of 3 types of rocks: sedimentary, igneous, and metamorphic
Lithosphere
includes the crust and uppermost part of the mantle and is broken into a number of plates which float and move on pat of the asthenosphere
Asthenosphere
a weak zone in the upper part of the Earth’s mantle where rock can be deformed in response to stress, resulting in movement of the overlying crust
IMIC
abbreviation for inner most inner core