Over the course of the next few weeks, the giraffes will be traveling to each and every second grade classroom on green days to participate in different inquiry-based science experiments. This week, we kicked off the first of our science experiments in our very own classroom with Ms. Riley. Since this was our first experiment, we has a science talk about what science is and who is a scientist. After chatting about what we consider to be science, we talked about the scientific method. Ms. Riley told us the question we'd be exploring was what makes your heartbeat change? We talked about the word "hypothesis" which is an idea you have about a question that you can test through experiments. We decided activities such as playing, running, and exercising as well as worrying might make your heartbeat speed up and relaxing, sleeping, and holding your breath might make it slow down.
We decided we could test running and relaxing at school. We worked with a partner and used a cardboard tube to listen to one another's regular heartbeats. Afterwards, we took turns running in place for one minute. After we finished running, our partners listened to our heartbeats and discovered it was not only much faster, but also much louder! Once both partners had the chance to run and listen, we all laid on the floor with our eyes closed, taking deep breaths to relax our bodies. Afterwards, we listened to our heartbeats again.
After recording our results, we discovered that everyone's heart rate got faster after running, and almost everyone's heart rate slowed down after relaxing. Based on our results, we concluded that running would make your heart beat faster and relaxing could make it slow down. Check out the videos we have from our experiment--the reactions to our heart rates after running is especially priceless!
Running in Place
Listening to Our Hearts After Running