Question

Which statement best explains why this extrusive volcanic rock does not have visible crystals?

Answer 1

Extrusive volcanic rocks are formedon the surface of the earth and cool relatively quickly from lava erupted from a volcano. The rapid cooling oflava on the surface does not allow forvisible crystals to form. ... This magma cools slowly and so crystalsdevelop in these rocks. Granite is an intrusive igneous rock.
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Answer 2

Answer:

Extrusive or volcanic rocks:

These rocks are formed when magma breaks through the crust and reaches the surface of the earth (where it is called lava). It cools rapidly and solidifies to form rocks. The common rocks formed in this manner are basalt and obsidian.

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Explanation: