This fun, heart racing activity originally appeared as part of the Henry Ward’s Adventures in Science series developed for Ward’s Homeschool and is also available in PDF format.
At Home Science Adventure
Get your own heart racing with an exciting experiment to build your own stethoscope.
You will need:
- A cardboard paper towel roll
Experiment Steps:
- Working in pairs, one person should hold the roll over the other’s heart.
- Listen for the partner’s heartbeat, counting the number of beats per 30 minute.
- Run in place for one minute and then listen for the heart beat again, calculating the new beats per minute.
Explanation:
Notice the difference in heartbeat after exercise. The reason for the increased rate is the heart beating faster to pump more blood, and therefore oxygen, to the body for use while exerting energy.
