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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
Rocks and minerals play a very important role in our lives.
What problems would you face in their absence?
Write True or False. Rewrite the false statement correctly :
Rocks are used in construction industries.
Give an example of intrusive igneous rock.
Classify the following rocks by selecting the correct option given below:
Gneiss
Explain the structure of the earth’s interior?
Which rocks are associated with ores of metals?
Distinguish between the following:
Calcarious and Carbonacious rocks.
In what type of rocks do you find fossils and why?
Classify the following rock: Clay
Give one word for the following.
The outer layer of the earth.
Give one word for the following.
The best example of chemically-formed sedimentary rock, which has been formed by the evaporation of water from solution containing minerals.
Fill in the blanks
______ rock contain a low percentage of silica and a high percentage of basic oxides.
How are sedimentary rocks classified?
Give one term for the following statement:
Formed when mud layers compacted under great pressure composing 80% of this rock.
Give one term for the following statement:
Igneous rocks of deep seated origin.
Fossils are found in.
Igneous rocks are found in the regions of volcanoes.
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.
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
