Day 6: [THERMOS EFFICIENCY CHALLENGE!]

Today most of the period was dedicated to the design log section, but we did have other team members work on the thermos. For the "Thermos Efficiency Challenge," we checked how efficient our thermos was, and recorded the temperature to make our heat v.s. time graph. However the recording may need to be done again as the time and temperature when it first entered the thermos was not recorded because of human error. During the testing we made a few minor adjustments along the way as we noticed that the clay on top of the lid was becoming wet and soggy, so we put a small circular layer of foam underneath the clay. We also rechecked that our bottle held the physical requirements of 500 ml just in case, and at the very end of class we started doing the calculations for efficiency.