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After buying a gallon of milk, my next stop was the laboratory of Professor Less. He's a good friend of mine whose keen scientific mind had helped me out in the past. "Hi Prof.," I said. "I've got a hot tip about clouds, but I think it's all wet. What do you know about water in the sky?" |
| "There is always water in the air around us,
but it's not always visible," Professor Less replied. "It's in the air
as a gas called water vapor."
"Water is a liquid. How does it become a gas in the air?" I asked. "By evaporation," Professor Less said. "Water can exist as a liquid. But when water is heated enough it changes into a gas. This gas is called water vapor. Scientists call this process evaporation." "But how does that relate to clouds, Prof.?" I asked. I had to know. I'm an investigator. It's what I do. |
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