Question

how are extrusive and intrusive rocks formed​

Answer 1

Answer:

• when magma cools down outside on the earth surface then it forms extrusive igneous rocks. Eg.. Basalt rocks.
• when magma cools down inside the earth's crust then it forms intrusive igneous rock.Eg...Granite

Answer 2

Answer:

Extrusive rocks are formed when molten magma comes out from the volcano during volcanic eruption and cools down to solidify Igneous rocks. The rocksformed at the exterior of the volcano are called extrusive rocks.

Intrusive rocks are formed when the particles of the magma are left inside the volcano and cools down to solidify to form Igneous rocks. The rocks formed at the interior of the volcano are called Intrusive rocks.