Pressure Experiment
Amazing Paper Ball
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Materials you will need:
• A piece of paper
• A plastic drinking bottle (any size)
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Steps:
Use a clean and dry recycled plastic drinks bottle, one that
is easy to hold with one hand.
- Roll up a bit piece of paper into a small ball that will fit
easily into the opening of the drinks bottle.
- Hold the plastic bottle so that it is horizontal and rest the
ball of paper just inside the neck/opening of the plastic bottle.
- Hold the bottle with the ball up close to your mouth and blow
into the opening.
- Go on; try it again and again and again.
- What happens each time?
Have a go at trying this experiment with different sized (openings)
drinks bottles and different types of paper (tissue, tin foil, tracing
paper)
The air that you blew into the bottle hits the back or bottom of
the bottle and bounces back out the opening of the bottle and forces
the paper ball to blow out.
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