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प्रश्न
State the chief characteristics of metamorphic rocks.
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उत्तर
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They are harder and more compact than their original form.
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Most of them are impermeable; they do not allow water to percolate through them.
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They do not have fossils because fossils in sedimentary rocks are destroyed during metamorphism.
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They are formed due to a change in texture and composition of pre-existing rocks.
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New minerals are formed during the process of metamorphism.
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संबंधित प्रश्न
Fill in the blank
Sedimentary rocks are formed from _____________ accumulated over long periods.
Classify the following rocks by selecting the correct option given below:
granite
State two points of distinction between rocks and minerals.
Name any two characteristics of Igneous Rocks.
Distinguish between the following:
Thermal and Dynamic Metamorphism.
State the types of rocks for the formation of which the following process is involved.
Formation of large crystals, coarse texture and slow cooling and compaction.
What is metamorphism?
What are the causes of metamorphism?
How are sedimentary and igneous rocks formed?
Give one example of an area of: Metamorphic rocks,
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.
How are igneous rocks formed?
Distinguish between:
Internal Processes and External processes.
______ into slate caused by thermal metamorphism.
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 |
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. | Granite | 1. | Bed rock |
| B. | Soil layer | 2. | Plutonic rock |
| C. |
Barren island |
3. | Strip farming |
| D. | Soil conservation | 4. | Active Volcano |
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
