Bell Worksheets Portrait

Science Project

Homemade Telephone

Experiment: Sound travels along string. Make your own telephone out of cups and string to try it out!

Materials

pin

2 plastic cups

string

Directions

1. Poke a hole in the middle of the bottom of the cups with a pin.

2. Cut string so it is 10-60 feet long.

3. Put the string through the hole on the bottom of each cup.

4. Tie a knot on each end of the string.

5. Pull tight and speak into one cup while another person listens in the other cup.

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