Soggy Popcorn

Q: How does the amount of moisture affect the size and volume of popcorn?

Procedure:
1. Put 2 cup of yellow popcorn kernels into each of 2 glass jars with lids. Label one "A" and one "B".
2. Close the lid tightly on "A".
3. Add 1/8 cup of water to "B" and close the lid tightly.
4. Put 1 cup of popcorn on a paper towel and spread them around in an even layer. This is sample "C".
5. Leave all the samples in a cool, dry place for 7 days. Turn the glass jars once a day and record any visible changes.
6. Pop all samples 1/2 cup at a time. With each batch, measure the total volume. Measure 10 popped kernels and calculate the average size. Rate the batch as small- less than 1/2 inch, medium-1/2-3/4 inch, or large-more than 3/4 inch.
Compare.

Other ideas: compare different types of popcorn, or popcorn stored in other locations such as the refrigerator or freezer.