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) composition; the ability to flow without breaking
B) color; composition
C) the ability to flow without breaking; composition
D) composition; composition,as well

Question

Quizplus · Accepted Answer

The crust and mantle differ primarily in composition, with the crust being made up of lighter, more silicate-rich rocks and the mantle being made up of denser, more iron- and magnesium-rich rocks. The lithosphere and asthenosphere differ primarily in their ability to flow without breaking, with the lithosphere being more rigid and brittle and the asthenosphere being able to flow like a soft plastic.

The Distinction Between the Crust and the Mantle Is Primarily