Hydrosphere

The hydrosphere is the total mass of water on, under, and over the surface of a planet. It is part of physical geography. The oceans, rivers, and lakes are all part of the hydrosphere. Some electricity is made by the hydrosphere.

The total mass of the Earth’s hydrosphere is about 1.4 × 10²⁴ grams, which is about 0.023% of the Earth’s total mass. Around 2 × 10¹⁹ grams of this is the Earth’s atmosphere. In addition, 71% of the Earth’s surface, an area of 361 million square kilometers, is covered by ocean.^[1]