Why is the Earth called the ‘Blue planet’?

Question

Question: Why is the Earth called the ‘Blue planet’? What is reason behind it?

Answer 1

The Earth is called the ‘Blue planet’ because more than 71% of the Earth's surface is covered with water.

When seen from the space, the Earth appears Blue due to the presence of abundant water on the planet's surface.

That's why, Earth is called the ‘Blue planet’.

Image source and Learn more at: University of Michigan website