Question

How are extrusive and intrusive rocks formed ​

Answer 1

Answer:

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. ... If lava cools almost instantly, the rocks that form are glassy with no individual crystals, like obsidian.

Answer 2

Extrusive: extrusive rocks are formed due to rapid cooling and solidification of molten magma on earth's surface.

intrusive: intrusive rocks are formed when molten magma cools down inside the earth's crust.