Project 5 – Moisture Test Comparison

What you will need:

  • 3 cups of yellow popcorn kernels
  • Hot air popper
  • Large bowl
  • 2 quart measuring cup
  • 2 glass jars with lids
  • 3 large paper grocery bags
  • Paper towels
  • Ruler

Here’s what you do:

  1. Draw out a data chart to record final results. Your control variables will be your Sample A, Sample B, Sample C. Your results will include Volume, Number of unpopped kernels, and Kernel size.
  2. Divide the popcorn into three 1-cup samples, by putting one cup into each of the two glass jars and labeling the jars A and B. Measure one cup onto paper towel and label the towel C.
  3. Close the lid tightly on jar A.
  4. Add 1/8 cup of water to jar B, and close lid tightly.
  5. Spread sample C kernels around evenly on the paper towel.
  6. Leave all samples in a cool; dry place for 7 days – turning the glass jars over once a day. Record any visible changes in the kernels inside the jars and on the towel.
  7. After 7 days, begin experiment.
  8. Preheat air popper one minute before adding corn.
  9. Pour 1/2 cup of sample A into popper and begin popping. Catch popcorn in large bowl.
  10. Measure the size of one popped kernel, in inches, and record using the Following scale:Large = more than 3/4″
    Medium = 1/2″ to 3/4″
    Small = less than 1/2″
  11. Measure all the resulting popped corn into one grocery bag (label bag A) Repeat this with 1/2 cup of sample A kernels. Record results on data Chart.
  12. Repeat steps 9 through 11 with sample B and sample C.

Now What Do We Know?

  • Is there a difference in look and texture between popped samples?
  • Which sample popped the lowest volume?
  • Which sample popped the highest volume?
  • How does moisture level of unpopped kernels affect popping volume and texture of popped corn?




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