Each year the frontier school division does the science fair. This year i did a project on plastic wrap and tinfoil. My partner and I tested which one would keep something warmer in a cold place.

       When we did this we put water in a cup and put tinfoil all the way around one, then we put plastic wrap around the other. We tested each cup of water in the freezer, fridge, and outside for about 4 minutes each. After we took them out we checked the temperature with a thermometer. When the teats were done we found out that the tinfoil keeps more heat in that the plastic wrap. We found that that reason that the plastic wrap dpesnt hold much heat, is because the plastic wrap has pores that the heat ecscapes from.