ICSE Class 9 Geography Question 16 of 18

Rocks and Rock Cycle — Question 2

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Question 2

Volcanic rocks and plutonic rocks

Answer
S.
No.
Volcanic rocksPlutonic rocks
1.They are also called extrusive rocks.They are also called intrusive rocks.
2.They are formed when magma solidifies on the surface of earth.They are formed when magma solidifies within the earth's crust.
3.They are smooth, crystalline and fine grained.They are coarse textured, hard rocks with large crystals.
4.For example- basaltFor example- granite