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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
Write True or False. Rewrite the false statement correctly :
Sedimentary rocks are formed by the cooling and solidification of molten rock called magma
How are sedimentary rocks formed?
Why are the igneous rocks also called the primary rocks?
Mention any two characteristics of Sedimentary Rocks.
What processes are involved in the formation of Igneous Rocks?
Distinguish between the following:
Plutonic and Volcanic rocks.
Distinguish between the following:
Acid Igneous Rocks and Basic Igneous 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.
Explain the formation of sedimentary rocks on the basis of agents of formation.
How are rocks important to us?
What is meant by the term ‘metamorphism’?
Classify the following rock: Quartzite
Give one term for the following statement:
Formed when mud layers compacted under great pressure composing 80% of this rock.
Fill in the blank below:
______are intrusions of igneous rock that are vertical in shape
This is the storehouse of rocks.
Lava comes out from a volcano.
What are the uses of soil?
Sedimentary rocks are called stratified rocks.
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 |
