Why would you expect the crystals in an intrusive rock to be larger than the crystals in an

extrusive rock?

A. The crystals in intrusive and extrusive

rocks are generally the same size.

B. Intrusive rocks cool more rapidly, which

produces larger crystals.

C. Intrusive rocks cool more slowly, which

produces larger crystals.

D. The chemical composition of intrusive

rocks produces large crystals.

Question

Biology

Toby Greene

15 July, 10:54

Why would you expect the crystals in an intrusive rock to be larger than the crystals in an

extrusive rock?

A. The crystals in intrusive and extrusive

rocks are generally the same size.

B. Intrusive rocks cool more rapidly, which

produces larger crystals.

C. Intrusive rocks cool more slowly, which

produces larger crystals.

D. The chemical composition of intrusive

rocks produces large crystals.

+5

Answers (1)

Know the Answer?

Mariam Lindsey · Answer 1

C. Intrusive rocks cool more slowly, which produces larger crystals

Explanation:

Intrusive rocks are igneous rocks that form beneath the surface. Unlike extrusive rocks (rocks that form above the surface), intrusive rocks cool down more slowly, so this allows crystals more time to grow before they completely cool down and solidify.