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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?
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
Classify the following rocks by selecting the correct option given below:
shale
Give two examples of metamorphic rocks.
What is metamorphism?
Classify the following rock: Shale
Classify the following rock: Limestone
Classify the following rock: Basalt
Give one word for the following.
The core of the earth occupied by rock in iron and nickel.
Fill in the blanks
______ is the best example of the wind deposited stratified rock.
Give one example of an area of: Igneous rocks
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:
Rounded or sub-rounded fragments, usually water-born cobbles, pebble and gravel, cemented together by a matrix of calcium carbonate, silica, etc.
Give reasons for the following
Silicates are the most common rock forming minerals.
______ is the kind of metamorphic rock using which Taj Mahal was built.
______ are chemical substances which exist in nature.
Sedimentary rocks are called stratified rocks.
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.
