Questions and Answers
What are the three major groups of rocks?
What is igneous rock?
A rock that forms from magma.
What is magma?
A mixture of molten rock and gases.
How do igneous rocks form?
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What is intrusive rock?
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What is extrusive rock?
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What is sediment?
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What is sedimentary rock?
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How are sedimentary rocks classified?
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What are clastic rocks?
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What is metamorphic rock?
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How do metamorphic rocks form?
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What are foliated rocks?
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What is the rock cycle?
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How can one rock change into another?
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Study Notes
Major Groups of Rocks
- Rocks are categorized into three primary groups: igneous, sedimentary, and metamorphic.
- Classification is based on their formation processes.
Igneous Rocks
- Formed from magma, which is a mixture of molten rock and gases.
- Development occurs when molten material cools and solidifies either underground or at the Earth's surface.
- Types:
- Intrusive rocks: Created from hardened magma beneath the Earth's surface.
- Extrusive rocks: Formed at the surface when magma escapes and cools.
Sedimentary Rocks
- Composed of sediments, which are small solid fragments from rocks or organisms.
- Created over time as these sediments accumulate, compact, and cement together.
- Classified into three main categories:
- Clastic rocks: Formed from broken fragments of other rocks.
- Chemical rocks: Precipitated from solutions.
- Organic rocks: Accumulated from the remains of living organisms.
Metamorphic Rocks
- Result from the transformation of existing rocks due to heat, pressure, or chemical reactions.
- Most commonly formed at high temperatures and deep within the Earth.
- Types:
- Foliated rocks: Characterized by crystals arranged in parallel layers or bands.
Rock Cycle
- Describes a continuous series of processes through which rocks change from one type to another.
- Involves various forces both within the Earth and at its surface, facilitating the transformation of rocks through different geological processes.
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Description
Explore the major groups of rocks, including igneous, sedimentary, and metamorphic. This quiz will test your understanding of their formation processes, types, and classifications. Delve into how these rocks are created and transformed over time.