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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
Classify the following rocks by selecting the correct option given below:
marble
Distinguish between the following pair:
Degradation and aggradation
Distinguish between the following:
Plutonic and Volcanic rocks.
State the types of rocks for the formation of which the following process is involved.
Accumulation takes place over long periods of time in seas, lakes and streams.
What are the causes of metamorphism?
Give some examples of metamorphic rocks formed from sedimentary and igneous rocks.
Classify the following rock: Basalt
Classify the following rock: Marble
Give one word for the following.
Stratified rock formed organically but from vegetative matter-swamps and forests.
Give one word for the following.
A sedimentary rock, which is composed of microscopically fine, soft and smooth particles.
Fill in the blanks
______ rock contain a low percentage of silica and a high percentage of basic oxides.
State the properties of metamorphic rocks.
Give one term for the following statement:
Type of metamorphism in which changes are caused due to high pressure.
What are fossils?
Which Soils are formed by the weathering of metamorphic rocks?
The word Ignis means 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.
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 |
