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1 Lava flows are typically finer grained than intrusive igneous rocks. Why?
- AA) Intrusive magma is cooler because it is well insulated by the surrounding rock.
- BB) Intrusive magma flows onto the Earth's surface and cools very slowly, allowing many small mineral grains to grow.
- CC) The extrusive magma cools quickly so the mineral grains do not have time to grow.
- DD) The extrusive magma, because it is deep below the surface, cools very slowly producing very small mineral grains.
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- Quiz on Untitled, created by Briana Rivera on 22/02/2019.
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- Briana Rivera
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- English
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- Created on 22 Feb 2019 · updated on 22 Feb 2019
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