Read the students notes very carefully and write a complete materials list for the investigation. This investigation was about pulse rate we checked or pulse rates when we were resting and during different kinds of exercise. I thought that exercise would make our pulse rates increase. We used to watch with a second hand time ourselves when we measured our pulse rates. We measured our pulse for 15 seconds. We can use this measurement to calculate pulse rates per minute. We also check the pulse five minutes after exercise. We wanted to see if our pulse rates returned to the resting level. We will need to do calculations in order to convert these results to pulse rate per minute. These results should allow us to see the effect of exercise on our pulse rates. While we were investigating, we noticed that there are differences between our pulse rates. We wonder how much variation there is among all the students in our class.