Count out 100 kernels of popcorn and pop them. Count how many actually popped. This trial is your control group.
Count out another 100 kernels, and heat them for a few hours in an oven set a 220 degrees. Then, pop the kernels and count how many popped. This trial will show whether removing water from the kernels will help them pop better.
Count out another 100 kernels, and soak them in water for a few hours. Then, pop the kernels and count how many popped. This trial will show whether adding water will help the kernels pop better.