Flight Show
Materials Needed:
·
Straw
·
Ping-Pong
ball
What to Do:
1. Take the straw, hold it in your mouth, and point it straight up.
2.
Blow pretty hard through the straw to make a good air stream.
3. Set the ball gently in the air stream. The ball should float in
the stream! Make sure you do not chase the ball, and just let it float in the
steady stream. It won’t go anywhere if you keep pointed up in one place!
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Materials Needed:
·
2 balls such as baseballs or apples
·
a length of string or twine
approximately 1 1/2 - 2 feet long
·
some scotch tape or screws
What to Do:
1.
Attach a ping pong ball to each end of
the string, and hang them someplace where they will not affected by wind. Make
sure they are level, and about an inch apart. In a moment, we are going to blow
in between the balls, but first, what do you think will happen?
2.
Now we're ready to go; blow right in
the center, between the balls (right where the arrow is in the drawing). Now
try harder. Now blow as hard as you can.
3.
Did you predict that the balls would be
blown apart by the wind you created? Were they? More likely, they actually
moved closer to each other. How could that happen?
4.
(If you have a hair dryer and a couple
of baseballs, you can do the same experiment, and the balls won't blow around
as much.)
Materials
Needed:
·
Ping-Pong
Ball
·
Two
cups or glasses
·
Lots
of air!
What
to Do:
1.
Set up the cups next to each other (See
diagram)
2.
Blow
very hard where the arrow is in the diagram straight across the top of the
glass
3.
The
ping-pong ball should fly into the other glass.