Prove that 'Aircontains dustand smoke' .

1.	Prove that 'Aircontains dustand smoke' .
Answer» Solution :Close all the doors and windown with curtains PULLED down to MAKE the DARK . Now open the DOOR or awindow facing the sun , just a LITTLE, in such a way that it window facingthe sun , just a little, in such a way that it allows sunlight to enther the room only through a slit . we seesome tinyshining particles moving in the beam of sunlight .Thisshows that air also contains dust particles.

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