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प्रश्न
What are known as metamorphic rocks?
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उत्तर
Metamorphic rocks are formed by the complete change of texture of rocks through volcanism and diastrophism. When igneous or sedimentary rocks are buried deep inside the Earth, they face high heat and pressure. This changes their minerals and structure, creating new rocks with different properties.
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संबंधित प्रश्न
Write True or False. Rewrite the false statement correctly :
Igneous and sedimentary rocks can change into metamorphic rocks.
The photograph shows you a type of rock that is widely used in the construction industry.
- Name the type of rock.
- How is it formed?
Which rocks are associated with ores of metals?
Which agents are responsible for deposition of sediments?
Distinguish between the following:
Sills and Dykes.
Explain the formation of sedimentary rocks on the basis of agents of formation.
Name different types of sedimentary rocks.
Classify the following rock: Clay
Classify the following rock: Gypsum
Give one word for the following.
Igneous rocks, which contain a low percentage of silica.
Igneous rocks are called primary rocks.
Mention the types of rocks based on formation?
The types of rocks based on formation are
Distinguish between:
Internal Processes and External processes.
The word Ignis means rock.
______ refer to rock in Greek.
Minerals exist in nature ¡n the form of ______ or ______.
Explain the different types of sedimentary rocks.
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Match the following.
| Group A | Group B | ||
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
