Bill wants to prevent a gallon of ice cream from melting outside where the air temperature is 82 °F. He uses these materials to construct a wrap:
o sheets of newspaper
o clear plastic bag
o aluminum foil

Bill places the gallon of ice cream into the clear plastic bag. He then wraps it in sheets of newspaper.
Finally, he wraps the entire bundle in aluminum foil. After it is wrapped in the materials, the ice cream is placed outside on a concrete sidewalk in direct sunlight for 20 minutes.

A. Explain why the plastic bag and the newspaper may help prevent the ice cream from melting.

B. Describe one way to improve the design of the wrap without changing the materials used in the
first design. Be sure to include how each design improvement would affect thermal energy transfer.