It Took So Long for True Crust to Form on Earth

question 48

Multiple Choice

It took so long for true crust to form on Earth because

• A)Earth had to complete the differentiation process before rocks could form.
• B)temperatures were so high that any crust that did form was quickly remelted.
• C)there was no atmosphere on the planet and thus no air to cool the crust.
• D)heat from the creation of the magnetic field kept the surface molten.

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Definitions:

Tunica Intima

The innermost layer of a blood vessel, composed of endothelial cells that line the interior surface of the vessel.

Endothelium

A thin layer of cells lining the interior surface of blood vessels and lymphatic vessels.

Popliteal

Referring to the area behind the knee where the popliteal artery and vein are located, involved in the circulation to the lower leg.

Descending Aorta

The portion of the aorta that extends downwards from the arch of the aorta, distributing oxygenated blood to the lower parts of the body.