Podcast
Questions and Answers
What are rocks and minerals made of?
What are rocks and minerals made of?
- Rocks and minerals are made of metallic matter
- Rocks and minerals are made of synthetic matter
- Rocks and minerals are made of mineral matter (correct)
- Rocks and minerals are made of organic matter
Which type of rock forms 95% of the Earth's crust?
Which type of rock forms 95% of the Earth's crust?
- Igneous rocks (correct)
- Sedimentary rocks
- Organic rocks
- Metamorphic rocks
How are sedimentary rocks formed?
How are sedimentary rocks formed?
- By volcanic eruptions
- By alteration of pre-existing rocks
- By cooling and consolidation of magma
- By transportation and cementation of fragmentary material (correct)
What leads to the formation of igneous rocks?
What leads to the formation of igneous rocks?
What are the natural agencies that transport fragmentary material for the formation of sedimentary rocks?
What are the natural agencies that transport fragmentary material for the formation of sedimentary rocks?
What are rocks and minerals made of?
What are rocks and minerals made of?
How are igneous rocks formed?
How are igneous rocks formed?
What processes lead to the formation of sedimentary rocks?
What processes lead to the formation of sedimentary rocks?
What percentage of the Earth's crust is composed of igneous rocks?
What percentage of the Earth's crust is composed of igneous rocks?
How are sedimentary rocks formed?
How are sedimentary rocks formed?
Flashcards
Igneous rock composition
Igneous rock composition
Igneous rocks are made of mineral matter from cooled and solidified magma or lava.
Sedimentary rock formation
Sedimentary rock formation
Sedimentary rocks are formed from fragments of eroded rocks, cemented together.
Igneous rock percentage
Igneous rock percentage
Over 95% of Earth's crust is made of igneous rock.
Sediment transport agents
Sediment transport agents
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Rock forming material
Rock forming material
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Igneous rock origin
Igneous rock origin
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Rock types
Rock types
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Sedimentary rock creation
Sedimentary rock creation
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Basic rock material
Basic rock material
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Sedimentary Processes
Sedimentary Processes
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Study Notes
Rocks and Minerals
- The Earth's crust is composed of rocks and minerals.
- A rock is defined as a hard mass of mineral matter consisting of two or more rock-forming minerals.
Earth's Crust Composition
- Igneous rocks make up 95% of the Earth's crust.
- Sedimentary rocks make up 5% of the Earth's crust.
Formation of Rocks
- Rocks are formed through three main processes:
Cooling and Consolidation of Magma
- Igneous rocks are formed by cooling and consolidating molten magma within or on the surface of the Earth.
- Examples: igneous rocks.
Transportation and Cementation of Fragmentary Material
- Disintegration and decomposition of pre-existing rocks lead to the formation of fragmentary material.
- This material is transported by natural agencies (wind, water, and ice) to low-lying areas like oceans.
- Consolidation of these materials after deposition results in the formation of Sedimentary rocks.
Alteration of Pre-existing Rocks
- Primary and secondary rocks can undergo alteration to form new rocks.
- This process is subject to various environmental factors.
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