When you heat something it becomes lighter, if it started of as a solid it will eventually become light enough to be a liquid, and liquids become gases. When you heat water to 100 degrees Celsius (212 degrees Fahrenheit) it becomes light enough to become vapour, at this point it also becomes lighter than air so it immediately rises. The reason you can see steam is that when it floats it cools from the air and forms droplets.
Water evaporates at 100 degrees centigrade. It turns into steam if you get heat it up very much. Wonder why i was the first one to answer this question...it's very simple.
water changes to steam by the process called evaporation
This process is called boiling.
Chemical changes are those in which the chemical composition of a substance changes during the process. But when steam turns into water or vice versa, only the physical state of the substance undergoes a change but the chemical composition remains same. Thus steam turning into water is a physical change.
The steam when cooled changes back to liquid water
The process when water changes into a gas is called evaporation. Evaporation occurs for pure water at 100 degrees celsius (-173 K) when water molecules begin to move around very rapidly and split up.
water changes to steam by the process called evaporation
Evaporation
You can turn steam back into water by condensing it, condensation is a process which changes a gas into water.
This process is called boiling.
It changes it to steam by evaporation.
it is a physical change because you can actually see the process
It is by condensation that water vapor changes to liquid water.
Water changes to steam and can evaporate.
Chemical changes are those in which the chemical composition of a substance changes during the process. But when steam turns into water or vice versa, only the physical state of the substance undergoes a change but the chemical composition remains same. Thus steam turning into water is a physical change.
Steam water vapor
The steam when cooled changes back to liquid water
That is called boiling. And it is something you can see and observe, but it is something tht is chemically relted and so it is a chemical change.