Question

diffrenciate between extrusive and intrusive.

Answer 1

Difference between extrusive and intrusive rocks are : -

1) intrusive rocks are formed deep inside the surface of the earth whereas extrusive rocks are formed at the surface of the earth when magma finds a way to eject or pour out of the surface.

2) Intrusive rocks are formed from magma whereas extrusive rocks are formed from lava.

3) cooling and solidification of intrusive rocks takes place very slowly whereas contact with air and water causes cooling of extrusive rocks to take place at a very rapid rate.

4) granite is the best example of intrusive rocks whereas the basalt is a fine example of extrusive rocks.

5) Intrusive rocks are made up of enormous crystals whereas extrusive rocks have tiny crystals that can be seen only with a microscope

I hope it helps you ^_^

Answer 2

Intrusive rock is formed when magma crystalizes and solidifies underground to form big land like a mountain.

Extrusive rock refer to the mode of igneous volcanic rock formation in which hot magama inside the earth flows out onto the surface as lava or explode violently into the atmosphere to fall back as tuff.


hope this will helps...!!!