Class 7 Exam > Class 7 Questions > What are igneous rocks also known as?a)Second...
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What are igneous rocks also known as?
- a)Secondary rocks
- b)Sedimentary rocks
- c)Primary rocks
- d)Metamorphic rocks
Correct answer is option 'C'. Can you explain this answer?
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What are igneous rocks also known as?a)Secondary rocksb)Sedimentary ro...
Definition of Igneous Rocks:
Igneous rocks are also known as primary rocks. They are formed from the solidification of molten rock material, either magma or lava.
Formation of Igneous Rocks:
- When magma cools and solidifies beneath the Earth's surface, intrusive igneous rocks are formed.
- When lava cools and solidifies on the Earth's surface, extrusive igneous rocks are formed.
Characteristics of Igneous Rocks:
- Igneous rocks are typically hard and resistant to weathering.
- They can have a variety of textures, from fine-grained to coarse-grained, depending on the rate of cooling.
Examples of Igneous Rocks:
- Common examples of igneous rocks include granite, basalt, and obsidian.
Uses of Igneous Rocks:
- Igneous rocks are used in construction, as they are strong and durable.
- Some igneous rocks, like pumice, are used in abrasives and in the beauty industry for exfoliation.
In conclusion, igneous rocks are known as primary rocks and are formed from the solidification of molten rock material. They have various characteristics, textures, and uses in different industries.
Igneous rocks are also known as primary rocks. They are formed from the solidification of molten rock material, either magma or lava.
Formation of Igneous Rocks:
- When magma cools and solidifies beneath the Earth's surface, intrusive igneous rocks are formed.
- When lava cools and solidifies on the Earth's surface, extrusive igneous rocks are formed.
Characteristics of Igneous Rocks:
- Igneous rocks are typically hard and resistant to weathering.
- They can have a variety of textures, from fine-grained to coarse-grained, depending on the rate of cooling.
Examples of Igneous Rocks:
- Common examples of igneous rocks include granite, basalt, and obsidian.
Uses of Igneous Rocks:
- Igneous rocks are used in construction, as they are strong and durable.
- Some igneous rocks, like pumice, are used in abrasives and in the beauty industry for exfoliation.
In conclusion, igneous rocks are known as primary rocks and are formed from the solidification of molten rock material. They have various characteristics, textures, and uses in different industries.
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What are igneous rocks also known as?a)Secondary rocksb)Sedimentary ro...
Igneous rocks are also known as primary rocks because they form from the cooling and solidification of molten magma, representing the primary stage of rock formation.
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What are igneous rocks also known as?a)Secondary rocksb)Sedimentary rocksc)Primary rocksd)Metamorphic rocksCorrect answer is option 'C'. Can you explain this answer?
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