A Skillet Is Lined with a Thin Layer of Cooking

question 53

Multiple Choice

A skillet is lined with a thin layer of cooking oil followed by a layer of unpopped popcorn kernels.Upon heating the kernels all pop thereby escaping the skillet.Which of the following physical and/or chemical changes occurred?

• A)The water within each kernel is heated to the point that it would turn into water vapor as the kernels popped (physical change).
• B)The starches within the kernels are cooked by the high temperatures (chemical change).
• C)Both A and B occur.
• D)Physical and chemical changes cannot occur without a real chemical reaction taking place.

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