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The water
evaporates
. When water evaporates, it changes
from water in its liquid form to water in its gas form. The gas form
of water is called water vapor. The water vapor leaves the wet object
and goes into the air. As the water evaporates, the wet object gets dry.
What happens when you put a wet object in a sealed container?
It stays wet. If you put your wet swimsuit in a plastic bag, it’s still wet
when you take it out of the bag. Why? A little bit of the water in your
suit evaporates, but it can’t escape into the air. The water vapor has no
place to go, so your suit is still wet when you get home.
Have you ever seen water vapor in the air? No, water vapor is
invisible. When water changes into vapor, it changes into individual
water particles. Water particles are too small to see with your eyes.
The water particles move into the air among the nitrogen and oxygen
particles. When water becomes part of the air, it is no longer liquid
water. It is a gas called water vapor.
You can’t see water vapor in the sky.
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