In the formation of igneous rocks, large crystal size is closely related to ________.
A) percentage of silica
B) percentage of oxygen
C) fast cooling
D) slow cooling
E) absence of light

Question

Quizplus · Accepted Answer

Large crystal size in igneous rocks is closely related to slow cooling. When magma cools slowly, crystals have more time to grow and develop, resulting in larger crystal size. In contrast, fast cooling results in smaller crystal size or even a glassy texture. The percentage of silica or oxygen does not necessarily have a direct impact on crystal size, although it can affect the overall mineral composition of the rock. The absence of light is not a factor in the formation of igneous rocks.

In the Formation of Igneous Rocks, Large Crystal Size Is