question number 9 of 20 - earth science\nwhich of these can determine the size of grains in igneous…

question number 9 of 20 - earth science\nwhich of these can determine the size of grains in igneous rocks?\ndistance from a plate boundary\namount of rare minerals\nsize of the volcano\ncooling rate of molten rock

question number 9 of 20 - earth science\nwhich of these can determine the size of grains in igneous rocks?\ndistance from a plate boundary\namount of rare minerals\nsize of the volcano\ncooling rate of molten rock

Answer

Brief Explanations:

The cooling rate of molten rock (magma or lava) is a key factor in determining the grain - size of igneous rocks. Slow cooling allows large crystals to form, while rapid cooling results in small crystals or even glassy textures. The other factors listed do not directly determine grain size.

Answer:

D. Cooling rate of molten rock