How did the density and buoyancy of the materials that formed Earth affect its internal structure?
a. Denser materials, such as nickel and iron, pushed their way up to the Earth's surface and became it's crust, whereas less dense, more buoyant materials such as silicon and aluminum, were displaced down to the Earth's core.
b. Denser materials, such as silicon and aluminum, pushed their way up to the Earth's surface and became its crust, whereas less dense, more buoyant materials such as nickel and iron, were displaced down to the Earth's core.
c. Denser materials, such as nickel and aluminum, sunk to the Earth's center and became its core, whereas less dense, more buoyant materials such as iron and aluminum rose to the Earth's surface and became its primitive crust.
d. Denser materials, such as nickel and iron, sank to the Earth's center and became its core, whereas less dense, more buoyant materials such as silicon and aluminum, rose to the Earth's surface and became its primitive crust.
e. Denser materials, such as silicon and aluminum, sank to the Earth's center and became its core, whereas less dense, more buoyant materials such as nickel and iron rose to the Earth's surface and became its primitive crust.
d. Denser materials, such as nickel and iron, sank to the Earth's center and became its core, whereas less dense, more buoyant materials such as silicon and aluminum, rose to the Earth's surface and became its primitive crust.
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