Rock Types

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What are sedimentary rocks?

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Sedimentary rocks are types of rocks that are formed by the accumulation and compaction of sediments, which can include mud, sand, and tiny bits of rocks. They may also contain fossils.

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What is the process that forms metamorphic rocks?

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Metamorphic rocks are formed through extreme heat and pressure from inside the Earth, which transforms existing rocks into new types.

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What is the difference between extrusive and intrusive igneous rocks?

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Extrusive igneous rocks form from lava that cools quickly on the Earth's surface, often resulting in small crystals or vesicles. Intrusive igneous rocks form from magma that cools slowly beneath the Earth's surface, leading to larger crystals.

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What are sediments?

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Sediments are small particles of rock, minerals, and organic material that accumulate and can cement together to form sedimentary rocks.

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What is the significance of fossils in sedimentary rocks?

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Fossils found in sedimentary rocks provide evidence of past life and can help scientists understand the history of the Earth.

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How do crystals form in rocks?

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Crystals form in rocks when minerals crystallize from molten rock (magma or lava) as it cools, or from solutions as they evaporate.

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What is the rock cycle?

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The rock cycle is a continuous process that describes the transformation of rocks through various geological processes, including erosion, sedimentation, metamorphism, and melting.

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What are the main types of rocks?

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The three main types of rocks are igneous, sedimentary, and metamorphic.

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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.

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What is an example of an intrusive igneous rock?

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An example of an intrusive igneous rock is granite, which forms from magma that cools slowly.