Describe and give an example of how it possible for two igneous rocks to have the same mineral composition but be different rocks.

Because there are 2 types of igneous rocks: - •Intrusive rocks-are rocks when the magma cool’s down before reaching the surface of the earth. •Extrusive rocks-are rocks when magma cools down after reaching the earths surface. So their composition can be different because of the formation of the rocks at different places. Eg:-Granite rock:-intrusive rock. Basalt:-extrusive rock