Which statement of the following is true for igneous rocks?
- AThese have very few fossils
- BThey are porous to water
- CThey are both crystalline and non-crystalline
- DThese rocks do not contain silica
Show answer and explanation
Correct answer: (c) They are both crystalline and non-crystalline
Explanation
Igneous rocks are formed when magma (inside the Earth) and lava (on the outer surface) cool and solidify. They do not have layers and fossils are also not found in them. They are both crystalline and non-crystalline.