Earth's Interior

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Last updated 2:20 PM on 8/26/26
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11 Terms

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Crust

The thin and solid outermost layer of the Earth above the mantle

<p>The thin and solid outermost layer of the Earth above the mantle</p>
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Mantle

The layer of hot, solid material between Earth's crust and core.

<p>The layer of hot, solid material between Earth's crust and core.</p>
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outer core

A layer of molten iron and nickel that surrounds the inner core of Earth

<p>A layer of molten iron and nickel that surrounds the inner core of Earth</p>
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inner core

A dense sphere of solid iron and nickel at the center of Earth

<p>A dense sphere of solid iron and nickel at the center of Earth</p>
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Lithosphere

A rigid layer made up of the uppermost part of the mantle and the crust.

<p>A rigid layer made up of the uppermost part of the mantle and the crust.</p>
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Asthenosphere

The soft layer of the mantle on which the lithosphere floats.

<p>The soft layer of the mantle on which the lithosphere floats.</p>
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Mesosphere

The strong, lower part of the mantle between the asthenosphere and the outer core

<p>The strong, lower part of the mantle between the asthenosphere and the outer core</p>
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P waves

seismic waves that compress and expand the ground like an accordion

<p>seismic waves that compress and expand the ground like an accordion</p>
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S waves

A type of seismic wave that moves the ground up and down or side to side

<p>A type of seismic wave that moves the ground up and down or side to side</p>
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Seismic Waves

waves that travel through the Earth, generated by earthquakes or artificial explosions.

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Differentiation

the process by which Earth differentiated into layers of varying composition and density, separating heavier materials from lighter ones during its formation.