Question

How are igneous rocks formed?​

Answer 1

Explanation:

Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there.

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Answer 2

Answer:

Igneous rocks are formEd from the cooling and solidification of lava or magma. Furthermore, there are two types of igneous rocks: intrusive and extrusive.

Intrusive igneous rocks are formed when magma cools slow and it forms large crystals.

Extrusive igneous rocks are formed when lava cools quickly and forms small or no crystals. It may be vesicular meaning that it may contain air bubbles.