Types of Rocks

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What are the three main types of rocks?
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The three main types of rocks are igneous, sedimentary, and metamorphic.
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How are igneous rocks formed?
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Igneous rocks are formed from the cooling and solidification of magma or lava.
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How are sedimentary rocks formed?
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Sedimentary rocks are formed by the compaction and cementation of sediments.
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What are metamorphic rocks and how do they form?
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Metamorphic rocks are formed from existing rocks that undergo change due to heat and pressure.
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Name a commonly known igneous rock.
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Granite is a commonly known igneous rock.
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Name a commonly known sedimentary rock.
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Sandstone is a commonly known sedimentary rock.
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Name a commonly known metamorphic rock.
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Marble is a commonly known metamorphic rock.
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What is the rock cycle?
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The rock cycle is a series of processes through which rocks transform from one type to another.
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How does erosion contribute to rock formation?
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Erosion breaks down rocks into sediments that can form sedimentary rocks.
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Can igneous rocks turn into metamorphic rocks? How?
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Yes, igneous rocks can become metamorphic rocks through heat and pressure.
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What is the texture of igneous rocks like?
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Igneous rock texture ranges from coarse to fine, depending on the cooling rate of the magma.
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What factors affect the formation of metamorphic rocks?
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The formation of metamorphic rocks is affected by heat, pressure, and chemically active fluids.
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What is foliation in metamorphic rocks?
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Foliation is a layered or banded appearance in metamorphic rocks due to pressure alignment of minerals.
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What is the primary mineral component of limestone?
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Calcite is the primary mineral component of limestone.
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Why are sedimentary rocks often rich in fossils?
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Sedimentary rocks form in environments that deposit and preserve organic material, leading to fossil formation.
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