Igneous rocks are formed by the cooling, solidification, and crystallisation of molten magma either beneath the surface or on the surface of the Earth. When magma cools slowly beneath the surface, it forms intrusive igneous rocks with large crystals. When it erupts and cools quickly on the surface as lava, it forms extrusive igneous rocks with fine grains.
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प्रश्न
Describe how igneous rocks are formed.
लघु उत्तरीय
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उत्तर
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Rock and it's Types
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अध्याय 6: Rocks - EXERCISES [पृष्ठ ६४]
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संबंधित प्रश्न
Why is diamond clear and hard while graphite is soft?
Fill in the blank
Sedimentary rocks are formed from _____________ accumulated over long periods.
What is crust?
What are known as metamorphic rocks?
Distinguish between the following:
Acid Igneous Rocks and Basic Igneous Rocks.
Classify the igneous rocks on the basis of their place of origin.
What is meant by a rock?
Classify the following rock: Gneiss
Classify the following rock: Slate
Classify the following rock: Schist
Fill in the blanks
______ rocks are formed by the deposition of shells and skeletons of organism.
Why are Sedimentary rocks called the Secondary rocks?
How is Plutonic rock formed?
______ is known as the primary rocks.
Mention the types of rocks based on formation?
The types of rocks based on formation are
This is the storehouse of rocks.
______ rocks are also known as stratified rocks.
______ refer to rock in Greek.
Out of 2,000 different types, only ______ are the basic minerals commonly found all over the earth.
