Raul wanted to see if Jiffy Pop or Von's brand popcorn left fewer
unpopped kernels. He poured some of each type of popcorn into two
different types of pans containing oil. He popped the corn for three
minutes each. He then recorded the number of unpopped kernels in
each pan.
a. What were Raul's variables?
b. What were Raul's controls?
c. List two parts to Raul's experimental design that were planned correctly.
d. How might Raul have improved his experimental
design?