Question

Major portion of the earth's crust is mainly constituted of :
1. Oxygen and Iron
2. Oxygen and Silicon
3. Silicon and Iron
4. Silicon and Aluminium

Answer 1

Correct Answer - Option 2 : Oxygen and Silicon

The correct answer is Oxygen and Silicon.

• The major portion of the earth's crust is mainly constituted by Oxygen and Silicon.

• The most abundant elements in the earth’s crust are as follows.
  • Oxygen 46.6%
  • Silicon 28%

• Other Elements in the earth's crust
  • aluminium 8.2%
  • iron 5.6%
  • calcium 4.2%
  • sodium 2.5%
  • magnesium 2.4%
  • potassium, 2.0%
  • titanium 0.61%