Read on to find out. Water is never sitting still. Things would get pretty stale without the water cycle!
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Are you surprised that these water spheres look so small? They are only small in relation to the size of the Earth.
This image attempts to show three dimensions, so each sphere represents "volume. The smaller sphere over Kentucky represents Earth's liquid fresh water in groundwater, swamp water, rivers, and lakes.
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The volume of this sphere would be about 2,, mi 3 10,, km 3 and form a sphere about Yes, all of this water is fresh water, which we all need every day, but much of it is deep in the ground, unavailable to humans. Do you notice the "tiny" bubble over Atlanta, Georgia? That one represents fresh water in all the lakes and rivers on the planet.
Most of the water people and life on earth need every day comes from these surface-water sources.
The diameter of this sphere is about Yes, Lake Michigan looks way bigger than this sphere, but you have to try to imagine a bubble almost 35 miles high—whereas the average depth of Lake Michigan is less than feet 91 meters. The freshwater resources, such as water falling from the skies and moving into streams, rivers, lakes, and groundwater, provide people with the water they need every day to live. But, the unseen water below our feet is critically important to life, also.
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Scientists are still actively researching how our planet got to be so wet in the first place.
As the grains of dust and ice in the disk interact with themselves, those grains begin to form bigger and bigger clumps. Eventually those clumps form what we call planetesimals, the building blocks of rocky and giant planets. So even though there were most likely water molecules present in the mess of debris that made up the disk, it was too hot for water to condense into a liquid, causing it to evaporate instead.
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This leaves us with a bit of a puzzle. If the Earth could not have formed from the disk with its oceans already intact, how did they get here? Not sure of the difference between an asteroid and a comet?