CAP TIK-TIKI
Elasticity ( Rubber Elasticity )
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Scientific Concepts :- Elasticity ,Sound Energy, Potential Energy and Kinetic Energy.
Elasticity is a physical property of a material whereby the material returns to its original shape after having been stretched out or altered by force. Substances that display a high degree of elasticity are termed "elastic."
Examples:
Rubber bands and elastic and other stretchy materials display elasticity. Modeling clay, on the other hand, is relatively inelastic and retains a new shape even after the force that caused it to change is no longer being exerted.
We hear different types of sounds every day. Sound is a form of energy, caused due to vibrations and propagated in the form of waves. These waves reach our ears and vibrate our eardrums, enabling us to hear them.
In this Activity, we will learn to produce a periodic clicking sound using a button, rubber band, bottle cap, and cotton thread.
Lets Makes The TIK-TIKI -
The Cricket Sound.
Material Required
Sketch Pen or Marker
Scissors
Button of different size
Bottle Caps of different Bottles ( Different Size)
Cotton Thread or Wool
Rubber Band
Ruler
Nail Cutter ( Optional )
Take a cotton thread of length 30 cm. Mark 3 cm, from one of its ends.
Form a loop on the cotton thread at the mark made.
Tie a Knot.
Starting from the first knot, mark 2 cm.
Tie a knot, at the mark made. Continue marking and tying knots throughout the length of the cotton thread.
It's okay if the knots are not exactly 2 cm away - a little difference will not change the results.
Insert one end of the knotted thread into one of the button holes.
Pull it, until the first knot touches the button hole.
Secure the thread to the botton, with a knot.
Wet the end of the thread, for it to easily pass through the button hole.
Take a rubber band and cut it.
Push one end of the rubber band into the hole of the button, that is directly opposite to the one, through which you have inserted and tied the thread.
If the rubber band is too fat for the button hole, then cut at one end of the rubber band, to make it thin, along the edge, using scissors.
Or you can try pushing the rubber band through the button hole with the help of a needle/pin.
Pull the rubber band through the button hole and cross over both the ends of the rubber band.
Tie a knot.
Tie a second knot, above the first knot, firmly. The double knot will secure the rubber band.
Make two "V" notches diametrically opposite to each other on the bottle cap.
Place the rubber band over the bottle cap.
Ensure that the rubber band rests on the "V" notches.
Ensure that the button rests vertically on the bottle cap.
Now, run your fingers along the thread and hear the device make a wonderful chirping sound, similar to the cricket (insect).
Replace the button with a plastic bead.
Double the distance between the knots.
Replace the bottle cap with a plastic container (urine sample container).
To learn more about the variations of Sound - Clicking Noise, please go to Sound - Clicking Noise (Variations).
B.S.Bisht
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