Chapter: SCIENCE EXPERIMENTS & AMUSEMENTS FOR CHILDREN BY CHARLES VIVIAN. Simple Technical Steped Practical Projects for school and college students.
Blowing the Air Away
Blowing the Air Away
You will need: Paper, scissors.
Although
we cannot see the air which surrounds us it is possible to feel it. Clap your
hands in front of your face and you will feel a slight gust of wind. This is
the air which has been displaced by bringing your hands sharply together.
Another way of removing air is by blowing it out
of the way. This can be done in the following manner.
Cut two strips of paper.
Take a piece in each hand and hold them both in front of you so that they are
about 5 or 6 inches apart. Now blow steadily between the two sheets of paper.
You may think that by
blowing in this fashion you will send the strips of paper farther apart. This
will not be so. As you blow between them, the two pieces of paper will move in
toward each other until they almost touch.
This is because your action
of blowing has removed some of the air between the strips of paper thus causing
an area of low pressure at this place. As a result, the outer air forces the
strips of paper together.
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