The Distinction Between the Crust and the Mantle Is Primarily

question 1

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

---

Definitions:

Photosynthesis

The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water, generating oxygen as a byproduct.

Carbon Dioxide Fixation

The process of converting atmospheric carbon dioxide into a usable form of carbon by living organisms, crucial in photosynthesis.

RuBP

Ribulose biphosphate, a molecule that acts as the acceptor of carbon dioxide in the first step of the Calvin cycle during photosynthesis.

Carbons

Chemical elements with the symbol C and atomic number 6, essential to all known life, and the basis of organic chemistry.