Multiple choice

Earth is called 'The Blue Planet' because of the presence of

  1. hydrosphere

  2. troposphere

  3. ionosphere

  4. stratosphere

  5. exosphere

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

The presence of water on the surface of Earth gives it the blue colour. 71% of the surface of Earth is covered with water and only 29% is land.