It is all part of the water cycle. It does not matter when it starts since nobody can really define it. However, water cycles involves 2 (or 3, for some) processes most of the time. Evaporation and transpiration (water is lost to surrounding) changes the water to water vapour, then rises up to the earth's atmosphere. It then condenses to form clouds, before it falls as rain, snow or hail as a process of precipitation. These waters would then sip into the ground as groundwater or run into the water bodies by surface runoff before the whole cycle repeats itself.
it returns to the atmosphere during evaporation
It is through precipitation that water returns to the surface of the earth. It might be rain, hail, snow or another form.
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it is the water cycle
Troposphere. This is the lowest section of the earths atmosphere that contains 75% of the earths atmosphere by mass and 99% of the earths water vapour. This section of the atmosphere starts at the surface and extends 7-20km up, the thickness depending largely on where you are in the world.
Evaporation.
Evaporation-removes waterCondensationprecipitation-Returns water
transpiration
Evaporation from the ocean
it returns to the atmosphere during evaporation
It is through precipitation that water returns to the surface of the earth. It might be rain, hail, snow or another form.
we will all die!
Just as the Earth's Nitrogen cycle and its Carbon cycle are cyclic, the Earth's Water Cycle is just that; Water Vapor returns to the Atmosphere to complete the Cycle.
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it is the water cycle
Troposphere. This is the lowest section of the earths atmosphere that contains 75% of the earths atmosphere by mass and 99% of the earths water vapour. This section of the atmosphere starts at the surface and extends 7-20km up, the thickness depending largely on where you are in the world.
it is water cycle