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.
Advertisements
Advertisements
प्रश्न
Describe how igneous rocks are formed.
लघु उत्तर
Advertisements
उत्तर
shaalaa.com
Rock and it's Types
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 6: Rocks - EXERCISES [पृष्ठ ६४]
APPEARS IN
संबंधित प्रश्न
Why is diamond clear and hard while graphite is soft?
Discuss the importance of rocks for the construction business.
Write True or False. Rewrite the false statement correctly :
Igneous and sedimentary rocks can change into metamorphic rocks.
Differentiate between SIAL and SIMA.
Classify the following rocks by selecting the correct option given below:
granite
What are metamorphic rocks?
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.
Distinguish between the following pair:
Degradation and aggradation
State two points of distinction between rocks and minerals.
Name any three elements of the earth’s crust.
Distinguish between the following:
Acid Igneous Rocks and Basic Igneous Rocks.
How are chemically-formed sedimentary rocks formed? Give examples.
Classify the following rock: Peat
How are sedimentary rocks classified?
Which one of the following is the most widespread most and productive category of soil.
______ is known as the primary rocks.
Rocks are classified into ______ types.
Sedimentary rocks are called stratified rocks.
What are the characteristics of Sedimentary rocks?
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
