The terms evaporation and condensation will be familiar to everyone. In fact, the water cycle is all about this. There are no animals involved in the natural cycle.
Water is EVAPORATED from the sea due to the HEAT of the Sun. Cold air is denser and heavier than hot air. Hot air has more "kinetic energy" which in turn makes the atoms take up more space and therfore makes it less dense and lighter - IT RISES. Once this evaporated water reaches a specific height (I.E the top of the TROPOSPHERE - first layer of Earths atmosphere and layer of all weather) the water CONDENSES and clouds form. Once the cloud has become DENSE enough (big grey clouds - known as cumulonimbus clouds) it will be unable to "carry" it's own weight and then rain is released. It's important to note here that ice crystals form in the cloud, the ice crystals (also known as hail) TURN into rain as they are HEATED as they fall.
Water will then find its way back to the Ocean or will be evaporated before it gets there.
Thanks.
Adam King :-) X
Here's a pic to summarise all my text:
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