Question

Rocks that form from lava that has cooled quickly have large mineral grains.
true or false

Answer 1

Answer:

false

Explanation:

Extrusive igneous rock, also known as volcanic rock, is formed by the cooling of molten magma on the earth's surface. The magma, which is brought to the surface through fissures or volcanic eruptions, rapidly solidifies. Hence such rocks are fine-grained (aphanitic) or even glassy.