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. ... Intrusive rocks, also called plutonic rocks, cool slowly without ever reaching the surface.

Explanation:

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Answer 2

Answer:

Extrusive rocks- These are the rocks that are formed on the surface of the earth.when The molten magma or lava rushes towards the earth surface through the vent of the volcano .It cools down rapidly due to the contact with the earth's atmosphere and form extrusive rocks

Example-Granite,Basalt,etc

Intrusive rocks-They are formed inside the volcano.When the force of the volcano is not enough to push all the lava out of it some of the lava remains inside the vocano when cools down very slowly and formes intusive rocks.

Most popular example of this is Obsidian

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