The Distinction Between the Crust and the Mantle Is Primarily

question 11

Multiple Choice

The distinction between the crust and the mantle is primarily on the basis of a difference in ____________;the distinction between the lithosphere and the asthenosphere is primarily on the basis of a difference in ____________.

• A)chemistry (mineral content);degree of physical rigidity
• B)color;chemistry (mineral content)
• C)degree of physical rigidity;chemistry (mineral content)
• D)chemistry (mineral content);chemistry as well

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Definitions:

Early Crystallization

Early crystallization refers to the initial phase of crystal formation from a cooling magma or solution, influencing the texture and composition of igneous rocks.

MgO Content

The percentage of Magnesium Oxide present in a geological sample, important in determining rock composition and origins.

SiO Content

Refers to the concentration of Silicon Dioxide, a common compound found in the Earth's crust, often significant in determining the composition of rocks and soils.

Mafic Minerals

Dark-colored minerals that are rich in magnesium and iron, typically found in basalt and other mafic rocks.