Igneous Rocks and Related Concepts

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Igneous Rocks

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Rocks that form from the cooling and crystallizing of molten rock.

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Lava

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Molten rock that is on Earth’s surface.

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Magma

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Molten rock that is inside the Earth.

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Volcano

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A landform that igneous rocks are found near.

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Intrusive Rocks

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An igneous rock that forms from magma cooling slowly inside the Earth. Usually has large crystals and a coarse texture.

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Extrusive Rocks

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An igneous rock that forms from lava cooling quickly on the Earth’s surface. Usually has small or no crystals and has a fine texture. Can have air bubbles.

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Obsidian

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An extrusive rock that is used to make jewelry.

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Pumice

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An extrusive rock with air bubbles that is used to make soaps.

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Granite

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An intrusive rock with visible crystals used to make building materials.