How can you show that air contains water vapour

1.	How can you show that air contains water vapour
Answer» Hey DEAR here is your answer By doing ONE activity it's prove that air contains water vapour √ Just TAKE a cold glass of water and place it for a while. √ You will se drop of water OUTSIDE the glass √ As the water vapour in the air strike the cold glass they loose their kinetic energy √ They condense water at the outer surface √ in which we can see the vapour in the air hope it helps THANK you

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