Question

1. What are igneous rocks? 
2. State three differences between plutonic rocks and volcanic rocks. 

Answer 1

1. These are rocks formed due to cooling and solidification of hot molten magma or lava.
2.  
   1. Plutonic rocks are formed due to cooling and solidification of molten magma while volcanic rocks are formed due to cooling and solidification of lava
   2. Plutonic rocks are formed deep below the earth’s surface while volcanic rocks are formed on the earth’s surface
   3. Plutonic rocks have a slow rate of cooling while volcanic rocks have a fast/rapid rate of cooling
   4. Plutonic rocks have large size of crystals while volcanic rocks have very small sized crystals.
   5. Plutonic rocks have a coarse texture while volcanic rocks have a fine texture.