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प्रश्न
What are metamorphic rocks?
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उत्तर
Metamorphic rocks are those rocks which were formerly igneous or sedimentary rocks, but owing to extreme heat and pressure in the interior of the earth it has been changed or altered to such an extent that they are quite different from what they once were slate, which is in reality clay, and marble’ which is in reality lime stone. Other examples of metamorphic rocks are quartzite from sand stone, graphite from coal, gneiss from granite and Mica from Schist.
संबंधित प्रश्न
Rocks and minerals play a very important role in our lives.
What problems would you face in their absence?
What are minerals?
Classify the following rocks by selecting the correct option given below:
basalt
How are sedimentary rocks formed?
What are known as metamorphic rocks?
Distinguish between the following:
Thermal and Dynamic Metamorphism.
How are sedimentary and igneous rocks formed?
Classify the following rock: Gneiss
Give one word for the following.
The upper part of lithosphere, which is rich in silica and aluminium.
Give one word for the following.
The core of the earth occupied by rock in iron and nickel.
Give one word for the following.
Igneous rocks, which contain a high percentage of silica.
Give one term for the following statement:
Fine grained metamorphic rock, generally produced by the low grade metamorphism of shale.
Which of the following monuments are built-in igneous rock?
- The Taj Mahal
- Fort Raigad
- The Red Fort
- Ellora Sculpture
Which one of the following is the most widespread most and productive category of soil.
What are fossils?
The word ‘Igneous’ is derived from the ______ word.
Minerals exist in nature ¡n the form of ______ or ______.
Intrusive Igneous rocks are also called ______ rocks.
Why are crystalline rocks called so?
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
