Question

How clean is the air you breathe? Do this experiment to find out:
You will need :
Strips of paper approximately 3cm x 8cm size, Vaseline, Cello tape
What you have to do :
Smear vaseline on one side of the paper.With cello tape fix this paper this paper in different
places-the veranda , in the garden,inside a room.Make sure it is in a dry place .Leave it there for two
or three days.Take your stips down and examine them.
What do you see ? Are all the strips the same ?Make a note about your observation.

Answer 1

Answer:

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