Multiple choice

Which of the following options represents the correct decreasing order of the rock-forming elements in terms of their availability in the earth’s crust?

  1. Iron > Oxygen > Silicon > Aluminium

  2. Iron > Silicon > Oxygen > Aluminium

  3. Oxygen > Silicon > Aluminium > Iron

  4. Oxygen > Iron > Silicon > Aluminium

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Availability of various rock forming elements (in percent) in earth’s crust (in % mass) is Oxygen – 46.6 Silicon – 27.7 Aluminium – 8.1 Iron – 5.0