Question

explain intusive and extrisive rock.

Answer 1

Extrusive igneous rocks form when magma reaches the Earth's surface a volcano and cools quickly. Most extrusive (volcanic) rocks have small crystals. Examples include basalt, rhyolite, andesite, and obsidian. Intrusive, or plutonic, igneous rocksform when magma cools slowly below the Earth's surface.
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Answer 2

Extrusive igneous rocks are formed by the cooling of molten magma on the earth surfave. They are also called as volcanic rocks.

Intrusive igneous rocks are formed when the magma solidifies within the earth's crust it cools slowly.

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