Make your own stethoscope and check your heart rate before comparing it to others. You might not be a real doctor but you can still use some of their medical equipment as part of this fun science project.
You Will Need :
- A balloon
- A piece of tubing
- 2 small funnels
- Scissors
- A timer
- Rubber band (optional)
- A calculator (optional)
Process :
Take the piece of tubing and fit a funnel to each end. Stretch the balloon by blowing it up and then letting the air out. Cut off the top third of the balloon with scissors. Stretch the top third of the balloon tightly over the open end of one the funnels. If necessary, use a rubber band to hold it in place. Hold the other funnel to your ear. You should hear a low beating sound.
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