Choose the correct option to complete the statements given.
The term "Blue Planet" indicates presence of.
The earth is called a blue planet because of the presence of water in it. About 70 percent of the earth's crust is covered with water. And this imparts it with blue color as seen from the space.
During earth's formation, hydrogen molecules combine with oxygen molecules in the ratio 2:1 water is formed and because of earth's suitable temperature it remained in liquid form and supported life on earth.
The large amounts of water covering much of Earth's surface give it its blue appearance.