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प्रश्न
What is thermal metamorphism?
What do you mean by thermal metamorphism?
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उत्तर
Thermal metamorphism is the process where rocks undergo chemical changes due to exposure to high temperature. This causes the minerals in the rocks to melt, recrystallise, and reorganise into new minerals, resulting in a different structure and properties. It includes contact metamorphism (from direct contact with hot magma or lava) and regional metamorphism (due to high temperature and pressure inside the earth).
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संबंधित प्रश्न
Why is coal hard and chunky?
State two characteristics of the mantle.
What is Geology?
State two points of distinction between rocks and minerals.
Give two examples of sedimentary rocks.
Explain this term associated with rocks: Fossil fuels
State the types of rocks for the formation of which the following process is involved.
Solidification of magma on the surface of the earth.
How are sedimentary rocks formed?
Explain the formation of sedimentary rocks on the basis of agents of formation.
How are chemically-formed sedimentary rocks produced?
How are chemically-formed sedimentary rocks formed? Give examples.
Give one word for the following.
A sedimentary rock, which is composed of microscopically fine, soft and smooth particles.
Classify and explain the rocks.
How are igneous rocks formed?
What are metamorphic rocks?
Which Soils are formed by the weathering of metamorphic rocks?
Explain the different types of sedimentary rocks.
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
Match the following.
| 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.
