Which type of rock forms from cooling magma or lava?

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Multiple Choice

Which type of rock forms from cooling magma or lava?

Explanation:
Igneous rocks form when molten rock cools and solidifies. Whether magma deep underground or lava erupting at the surface, cooling and crystallization produce solid rock; slow cooling underground forms coarse crystals (intrusive rocks like granite), while rapid cooling at the surface yields fine crystals or a glassy texture (extrusive rocks like obsidian or rhyolite). This is different from sedimentary rocks, which come from deposited and lithified sediments, and from metamorphic rocks, which are rocks transformed by heat and pressure without melting. Foliated texture is a feature of some metamorphic rocks, not a general trait of igneous rocks.

Igneous rocks form when molten rock cools and solidifies. Whether magma deep underground or lava erupting at the surface, cooling and crystallization produce solid rock; slow cooling underground forms coarse crystals (intrusive rocks like granite), while rapid cooling at the surface yields fine crystals or a glassy texture (extrusive rocks like obsidian or rhyolite). This is different from sedimentary rocks, which come from deposited and lithified sediments, and from metamorphic rocks, which are rocks transformed by heat and pressure without melting. Foliated texture is a feature of some metamorphic rocks, not a general trait of igneous rocks.

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