Question

question of 7 class is why is earth called the blue planet

Answer 1

⭐ Holà Friend ⭐

EARTH IS OFTEN CALLED THE BLUE PLANET BECAUSE THIRD-FOURTH OF ITS SURFACE IS COVERED WITH WATER. 70 % OF THE SURFACE OF THE EARTH IS COVERED WITH WATER AND 30 % OF THE SURFACE OF THE EARTH IS COVERED WITH LAND.
AND DUE TO THE ABUNDANCE OF WATER ON ITS SURFACE, ALSO KNOWN AS BLUE PLANET.

Answer 2

because 70 percent of earth surface is covered by water