Evaluate the experiment. Identifying lipids Cut or tear open a small paper bag so that it will lay flat. Rub a small amount of some of the following foods in a small patch and write below it the name of the food. If the food doesn't completely rub into the paper, wipe the excess off with a paper towel. Immediately hold the paper up to the light and observe how much light is let through each spot.
Old time windows Open up a second paper bag and cover a large part of the middle of it with oil.
Wipe off the excess with a paper towel. Hold it up to the light. Years ago, pioneers used oiled paper as window material when glass was not available. It increased the amount of light that came in the house. Hold it close to some writing.