Igneous and Sedimentary Rocks

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What is an intrusive igneous rock?

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An intrusive igneous rock is formed from magma that cools and solidifies beneath the Earth's surface. Examples include granite and diorite.

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What is a sedimentary rock?

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Sedimentary rocks are formed from the accumulation and compaction of mineral and organic particles, often in layers. Examples include sandstone, limestone, and shale.

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What is the difference between intrusive and extrusive igneous rocks?

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Intrusive igneous rocks form from magma cooling slowly underground, resulting in larger crystals, while extrusive igneous rocks form from lava cooling quickly on the surface, resulting in smaller crystals.

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What are the three main types of sedimentary rocks?

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The three main types of sedimentary rocks are clastic (formed from fragments of other rocks), chemical (formed from mineral precipitation), and organic (formed from the remains of living organisms).

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How does granite form?

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Granite forms from the slow cooling of magma beneath the Earth's surface, allowing large crystals to develop.

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What is a clastic sedimentary rock?

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Clastic sedimentary rocks are formed from the accumulation of rock fragments or clasts that are cemented together. An example is sandstone.

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What is a chemical sedimentary rock?

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Chemical sedimentary rocks form when minerals precipitate from solution, often due to evaporation. An example is limestone.

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What is an example of an extrusive igneous rock?

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An example of an extrusive igneous rock is basalt, which forms from lava that cools quickly on the Earth's surface.

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What process leads to the formation of sedimentary rocks?

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Sedimentary rocks form through processes such as weathering, erosion, deposition, compaction, and cementation of sediments.

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What is the role of heat and pressure in metamorphic rocks?

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Heat and pressure can transform existing rocks into metamorphic rocks by altering their physical and chemical properties without melting them.