Question

why earth is called blue planet ​

Answer 1

Answer:

Earth is the only planet in our solar system that has a large amount of liquid water. About 74% of the surface of Earth is covered by liquid or frozen water. Because of this, people sometimes call it the blue planet. Because of its water, Earth is home to millions of species of plants and animals.

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Answer 2

Answer:

Earth is the only planet that has a large amount of liquid water....about 74% of the earth's surface is covered with water...

That's why people sometimes call it as Blue Planet...