Q. Consider the following:
  1. Earth's Crust
  2. Mantle
  3. Core
Which of the following is the correct decreasing order of share of above in total volume of the earth?

Answer: 2 3 1
Notes: Just beneath the crust is the mantle which extends up to a depth of 2900 km. below the crust. The crust forms only 1 per cent of the volume of the earth, 84 per cent consists of the mantle and 15 per cent makes the core.