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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
Fill in the blank
Granite is an example of intrusive ________ rocks.
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
What is the difference between the inner and the outer core?
Give an example of intrusive igneous rock.
What are metamorphic rocks?
State two characteristics of Basic Igneous Rocks.
Which rocks are associated with fossil fuels?
Name the three stages of lithification of Sedimentary rocks.
Explain this term associated with rocks: Laccoliths and Batholiths
Distinguish between rocks and minerals.
Classify the following rock: Basalt
Classify the following rock: Marble
Fill in the blanks
______ rock contain a low percentage of silica and a high percentage of basic oxides.
Give one term for the following statement:
Formed by evaporation in saline lakes.
Mention the types of rocks based on formation?
The types of rocks based on formation are
Oldest Sedimentary rocks of the world has been identified in Green land.
______ are chemical substances which exist in nature.
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 |
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
