Question

Igneous rock is considered extrusive or intrusive based on: a. how many holes the rocks contain c. whether they were formed by cooling above or below the earth's surface. b. the crystalline structure of the rock particles d. if they formed from magma or sediments Please select the best answer from the choices provided A B C D

Answer 1

whether they were formed by cooling above or below the earth's surface.

Step-by-step explanation:

Given that Igneous Rock is a form of rock which is characterized by its formation from the cooling and solidification of magma or lava. Again, Igneous rock can either be Extrusive or Intrusive.

However, igneous rocks are considered as extrusive, when basically they are formed from lava on the surface of the earth.

On the other hand, igneous rocks are considered as intrusive, when basically they are formed from magm below the surface of the earth.

Hence, Igneous rock is considered extrusive or intrusive based on "whether they were formed by cooling above or below the earth's surface."