Types of Rocks

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What are metamorphic rocks?

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Metamorphic rocks are rocks that have been changed from their original form (preexisting rocks) due to heat, pressure, and chemical reactions.

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How are metamorphic rocks formed?

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Metamorphic rocks are formed when preexisting rocks are buried deep within the earth and subjected to tremendous heat and pressure.

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What type of metamorphism occurs due to pressure?

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Regional metamorphism occurs when pressure causes the heating of rock.

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What are igneous rocks formed from?

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Igneous rocks are formed from the cooling and hardening of magma.

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What are the two main types of igneous rocks?

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The two main types of igneous rocks are intrusive (formed inside the earth) and extrusive (formed on the surface).

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What is compaction in sedimentary rock formation?

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Compaction is the process where sediments are pressed together under pressure, reducing their volume.

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What is lithification?

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Lithification is the process of turning sediments into solid rock through compaction and cementation.

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What are the three types of igneous rock composition?

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The three types of igneous rock composition are Felsic, Intermediate, and Mafic.

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What is the difference between intrusive and extrusive igneous rocks?

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Intrusive igneous rocks form from magma that cools slowly beneath the earth's surface, while extrusive igneous rocks form from lava that cools quickly on the surface.

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What is sedimentary rock?

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Sedimentary rock is formed from the accumulation and compaction of sediments, which can include minerals, organic material, and fragments of other rocks.