give a nice explanation Point by point about changes in Hydrosphere
Answers
Explanation:
The hydrosphere is the sum of all water on Earth and the water cycle that distributes it around the planet. Earth is unique in the solar system for its abundant surface waters. Our orbital distance from the sun, in addition to our unique atmosphere, gives Earth the right temperature in our middle-aged solar system to have water as a liquid, and lots of it. Venus is too hot, Mars is too cold. Earth is just right. Noted astronomer Carl Sagan described Earth as seen from distant space as a "pale blue dot," signaling our planet as an outpost of life. It's because of the hydrosphere that life flourishes on Earth.
Just as important as the existence of water is the hydrologic cycle that moves water around the globe. Driven by solar energy, surface waters evaporate into the atmosphere, condense, and fall back to the surface as precipitation, shaping continents, creating rivers, and filling lakes. This process has eroded billions of tons of surface material from the continents to the oceans, forming the major river deltas. By far, most of the hydrosphere is salt water - around 97 percent - but the 3 percent that is fresh is critical for terrestrial and fresh water species.
Water Distribution Water on Earth. Most of the water on Earth is either salty or inaccessible to humans. Only 3% is fresh, and of that only about 32% is unfrozen.
Answer:
A hydrosphere is the total amount of water on a planet. The hydrosphere includes water that is on the surface of the planet, underground, and in the air.