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प्रश्न
Describe the process that leads to exfoliation.
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उत्तर
When the surface layers of rounded rocks and boulders gradually peel off in layers is called exfoliation. This occurs due to expansion of the outer layer during the day and the contraction of the same layer during the night, repeatedly over a period of time.
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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 :
Minerals are organic substances.
Give an example of intrusive igneous rock.
Classify the following rocks by selecting the correct option given below:
marble
Distinguish between rocks and minerals.
Classify the following rock: Rock salt
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 one term for the following statement:
Formed by evaporation in saline lakes.
Distinguish between Intrusive and Extrusive Rocks
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
