How much is there in the water around you?
It’s not clear, but it’s worth a try to see how much water there is in the atmosphere and the ocean.
Source: ABC News (AU) title How do we know what water is in our atmosphere?
article The amount of water in the air depends on the density of the air, the thickness of the clouds and the temperature.
When air is hot, water vapour rises to the top of the cloud.
When it’s cold, the vapour slows down and cools as the atmosphere warms up.
Water molecules, which are lighter than air, form in the upper layers of clouds.
As the temperature increases, the water molecules in the lower layers move to the bottom.
As they cool down, water molecules move to higher layers, until they become so dense that they are called water vapours.
The lower layers contain water molecules that have been blown into space.
These water vapors become trapped in the troposphere, where the temperatures reach an incredible high.
When the water vapouring stops, the air above it stops too.
If you look at a picture of a cloud, you can see a ring of water molecules hanging out in the middle.
The water molecules can’t move through it, so the air below it starts to cool.
As air cools, it loses water molecules.
This happens because as the air heats up, it becomes hotter.
The air above the cloud is no longer able to hold more water molecules, so it condenses.
The clouds have now cooled enough to condense and the water is now condensing into water droplets.
If the water evaporates, the droplets sink to the ground and eventually, they evaporate.
The amount that water in our air is changing depends on how much heat it has lost and how much pressure is on it.
Source, image: Wikipedia