Question

question 6 of 15
what causes the pressure that allows diamonds to form in the mantle?

a. the suns gravity acting on earth

b. the weight of the rocks in the crust and core

c. the weight of the rocks in the crust and upper mantle

d. the weight of the rocks in the outer core

Explanation:

To determine what causes the pressure for diamond formation in the mantle, we analyze each option:

• Option A: The sun’s gravity acts on Earth for phenomena like tides, not mantle pressure for diamonds. Eliminate A.
• Option B: The core is below the mantle, and its weight doesn’t directly contribute to mantle pressure (the mantle is between crust and core). Eliminate B.
• Option C: The mantle is beneath the crust and upper mantle. The weight of rocks in the crust (above the mantle) and upper mantle (adjacent, above deeper mantle regions) exerts pressure on the lower mantle where diamonds form. This is correct.
• Option D: The outer core is below the mantle, so its weight doesn’t create pressure in the mantle. Eliminate D.

Answer:

C. The weight of the rocks in the crust and upper mantle