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

Question

Quizplus · Accepted Answer

The crust and mantle differ in mineral content (chemistry), with the crust being composed mostly of lighter silicates and the mantle being composed of denser, darker silicates. The lithosphere and asthenosphere differ in physical rigidity, with the lithosphere being stiffer and more rigid, while the asthenosphere is more plastic and deformable.

The Distinction Between the Crust and the Mantle Is Primarily