As part of our Inquiry unit investigating SOUND Room 14 made string telephones and discovered how they work...
PROCEDURAL WRITING: HOW TO MAKE A STRING TELEPHONE
What you will need:
* String * Scissors
* 2 plastic cups * Metre ruler
Instructions:
First get the scissors and poke a tiny hole in the bottom of the two cups.
Measure the string and cut to four metres.
After that take the string and poke it through the hole in the bottom of the cup and tie a knot.
Next do the same with the other cup.
Last thing to do is wind it up and then you’re all done.
By Harry
PROCEDURAL WRITING: HOW TO MAKE A STRING TELEPHONE
What you will need:
* String * Scissors
* 2 plastic cups * Metre ruler
Instructions:
First get the scissors and poke a tiny hole in the bottom of the two cups.
Measure the string and cut to four metres.
After that take the string and poke it through the hole in the bottom of the cup and tie a knot.
Next do the same with the other cup.
Last thing to do is wind it up and then you’re all done.
By Harry
EXPLANATION: HOW A STRING TELEPHONE WORKS
The voice makes the plastic cup vibrate. When the plastic cup vibrates the sound waves cause the string to vibrate. The sound waves can travel through the string to the other cup.
The string needs to be tight for the sound waves to travel.
By Abel
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