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Which of these can determine the size of grains in igneous rocks? Amount of rare minerals Distance from a plate boundary Size of the volcano Cooling rate of molten rock

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Lea Bonilla Professional · Tutor for 6 years

Answer

Cooling rate of molten rock

Explanation

1. Identify the main factor Grain size in igneous rocks depends on crystal growth time. 2. Link factor to given options Longer cooling → larger crystals; shorter cooling → smaller crystals. This links directly to cooling rate.