Hello, I am a water droplet. As a water droplet, for millions of years, I have been going through a cycle known as the water cycle. The water cycle has 5 different stages, but right now I am going through the evaporation stage.
During the evaporation stage, me and millions of other water molecules like me are changing states from a liquid to a gas. When I change into a gas I become less dense than the air around me and rise. when I rise I am pulling energy away from the surrounding area, creating a cooling effect.
As I rise higher in the troposphere the temperature decreases. As the temperature keeps decreasing, I start to loss energy to the surroundings which has a warming effect. As I cool down the molecules inside of me start to slow down, until I condense back into a liquid water droplet. As all of the other water around me condenses and joins, a cloud is formed.
As the clouds fill up with water, the water droplet start to bump into each other. When this happens I join with other water droplets to create drops, and when the drops become heavy enough that they are less buoyant than air, I fall down to the Earth. I can fall as four forms : liquid drops, snow, sleet, or hail. The way they fall depend on the temperature and the energy in the storm.
When I fall on land, I can either infiltrate the ground, or if the ground is saturated I runoff. When water runs off, we always flow towards lower elevation. Since bodies of water, such as lakes or streams, are located in lower elevation I flow into bodies of water. These bodies then flow into the sea.
When water droplets like me infiltrate the ground, we are absorbed my the land, and flow downward past the Earth's surface. Here the water groups into underground bodies of water such as aquifers. The water can stay here for as long as millions of years until it eventually flows back into the ocean, where the cycle begins again.