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Humidity is the amount or the relative proportion of water vapor in air in our atmosphere.

Higher the humidity more uncomfortable we feel. After a rain the atmosphere is more humid.  Dry air is less humid.  Humidity of 30% may be okay to tolerate.
Humidity could spoil some metals.


A mixture is a physical mixing of different elements and compounds in required proportions.  The mixed substances do not react chemically. Their physical appearance may change to some other color than the individual colors. Or, one of the substances dominates the mixture. 

A mixture can be separated by simple physical means or by dissolving in a solvent and evaporating also.

Example : mix salt and sugar.

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