Question

differentiate between extrusive and intrusive rock
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Answer 1

Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.

Answer 2

Answer:

Extrusive:-

1. They are formed by the cooling of molten magma on the earth's surface.
2. Since these rocks cools down slowly, they have coarse texture with large crystals
3. Example: Dolomite

intrusive rock:-

1. They are formed when magma solidifies within the the earth's crust.
2. Since these rocks solidify at a faster pace, they are smooth, crystalline and fine grained.
3. Example: Basalt