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The Science Behind the Trick:
Air pressure is all around us. The plastic lid sticks to the surface of the water and is pressed by air
pressure. Even when the glass is turned over, air pressure will hold the plastic lid in place.
Pick up the glass
with your other
hand and turn it over
quickly, but gently.
Slowly remove the hand
holding the top of the
glass. If done right,
the circle will stick to
the glass and the water
won't spill out.
Place your pitcher
and glass on a
table. Hide the
plastic circle in
the hand you
won't use to pour.
Pour water
from the pitcher into
the glass, until it
begins to overflow.
Say "I can tip this
glass of water over
my head and keep
it from pouring
out."MM
Tab
Place the glass upside down on the
plastic lid. Trace around the glass
to make a circle, drawing a little
tab as shown. Cut just outside the
circle to make it a little bit larger
than the mouth of the glass. Be
sure to cut out the tab.
Prepare your props
Perform
the trick
Put down the pitcher and cover
the mouth of the glass with the hand
hiding the plastic circle. Secretly place
the circle over the mouth of the glass,
covering the entire top.
Lift the glass over
your head and say
"Magic tricks are hot
work. I think I'll oo
cool off." Then ooo
gently push on the
tab. The plastic circle
will come off and the
water will fall on you!
Standards Link: Reading Comprehension: Follow multiple-step directions with accuracy.
This
trick
takes
a
little
practice.
Do
it
a
few
times
until
you
can
do
it
well.
Then,
perform
it
for
your
friends
and
family!
scissors
small
glass
clear
plastic
lid
pitcher
of
water
Explanation: The salt melts the surface of the ice. The coldness of the ice then refreezes this water, trapping the thread and freezing it to the ice.
Standards Link: Science/Investigation: Conduct simple experiments.
Most of the ocean doesn't freeze. Why? Salt water freezes at a lower temperature than fresh water.
ice cubes
thread
salt
1. Soak your thread in
some water then lay it
on top of an ice cube.
3. Lift the thread. Does
the ice cube cling to
the thread and get
lifted as well?
2. Sprinkle a tiny bit of
salt along the thread
and wait about 30
seconds.
www.kidscoop.com © Vicki Whiting May 2021
Official Kids Mag
