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प्रश्न
What are metamorphic rocks?
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उत्तर
Metamorphic rocks are those rocks that are formed by the metamorphism of pre-existing rocks due to high temperature or pressure or both. Igneous and sedimentary rocks completely change over long periods of time because of movements in the earth’s crust and volcanic or mountain-building activity.
The transformation of rocks due to high temperature is called thermal metamorphism. Alteration of parent rock due to the pressure exerted on rocks from the earth’s movements is called dynamic metamorphism.
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संबंधित प्रश्न
Fill in the blank
Sedimentary rocks are formed from _____________ accumulated over long periods.
With the help of your teacher, collect different types of rocks such as granite, sandstone, limestone, marble, slate, graphite, etc. and prepare a chart containing information about their colour, hardness, texture, and permeability.
State two points of distinction between rocks and minerals.
Give one difference between Extrusive igneous and Intrusive igneous rocks.
What are the causes of metamorphism?
Name different types of sedimentary rocks.
Give one word for the following.
Rocks formed by the cooling and solidification of molten rock from beneath the earth crust.
Fill in the blanks
______ is the best example of the wind deposited stratified rock.
Give one term for the following statement:
Formed when mud layers compacted under great pressure composing 80% of this rock.
Why fossils are preserved in Sedimentary and not in Igneous rocks?
