Week 4 What next?

In this weeks experiment we tested materials ability to fight the forms of heat transfer such as conduction and convection. We where then asked to choose a substance we did not test that we would have liked to. The substances that I chose to test where plastic bags, aluminum foil, cotton rag, and Saran wrap. I would have liked to try one of those thermal blankets you always see people wearing when they have a natural disaster. The seem to be made of a foil looking material and I can bet that they would do better trapping heat than any of my other materials. Heat is trapped or its movement is slowed by the amount of air pockets in certain materials. The more densely packet air pockets the better the R value. This is why the hair of a polar bear is hollow. The air inside helps retain the heat.