CHAPTER 6: THE ATOMIC NATURE OF MATTER ACTIVITY 3: INVESTIGATION


1 Conduct the investigation below and then fill in the blanks. Title: Is the mass of a popcorn kernel the same before and after it pops? Hypothesis: I think that the mass of the popcorn will that


. I am basing this on the fact .


Equipment: • Bag of un-popped microwave popcorn • Mass balance/Kitchen scales • Microwave Variables: • Independent – the popping of the kernels • Dependent – the mass of the bag of popcorn • Control – the bag will not be opened until after all measurements have been taken and recorded Method: • Find and record the mass of one microwavable bag of popcorn • Heat the bag of popcorn in a microwave for the recommended time • Once it has cooled, measure the mass of the popcorn and record Results: Qualitative: When I took the popcorn bag out of the microwave I noticed:


Quantitative: Mass before popping: Mass after popping: Change in mass:


g g g


Conclusion: From my results I can see that the mass of the popcorn is The mass changed by


The popping of popcorn is an example of a(n) g. g. The reason for this results is . change.


UNIT 2: FUNDAMENTALS


31


CHEMICAL WORLD


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