Why does our heart beats faster when we exercise? Experiment!

Today, we made an experiment about how our heart pumps blood around the body..

THE EXPERIMENT

You need: a chronometer watch, a worksheet, pencil and a stherotype.

Hypotesis: Why does our heart beats faster when we exercise?

Process:

Conclusion: Because we need more oxygen to produce more energy. So our heart has to pump faster to get the oxygen around our body more quickly.