Approximately how much of Earth's surface is covered by water?

71%

Explain-About 71 percent of the Earth's surface is water-covered, and the oceans hold about 96.5 percent of all Earth's water. Water also exists in the air as water vapor, in rivers and lakes, in icecaps and glaciers, in the ground as soil moisture and in aquifers, and even in you and your dog

the electromagnetic energy from the sun arrives in the form of visible and invisible light.