How long has hydrosphere been around?

The hydrosphere (from Greek ὕδωρ hydōr, "water" and σφαῖρα sphaira, "sphere") is the combined mass of water found on, under, and above the surface of a planet, minor planet, or natural satellite. Although Earth's hydrosphere has been around for about 4 billion years, it continues to change in shape.

Did the hydrosphere form first?

The water on the earth, which represents that part of the earth called the hydrosphere, came about as a result of continued earth cooling. ... The atmosphere, or air, was first, followed by the water.