Does eating breakfast affects your ability to remember thing?

I want to see if eating breakfast in the morning affects your ability to remember. There will be two groups of 50 students randomly selected. Group A will eat the same kind of breakfast while group B does not eat anything. Then, both groups will be put into a lecture hall to remember a story for 10 minutes. After that they will relax for 15 minutes and then take a test based on that story. Whichever group that scores the highest on the test is the group that remembers better than the other group.

In my experiment the independent variable is breakfast and my dependent variable is the ability to remember. My hypothesis is that the students who ate breakfast will be able to remember better than the students that did not eat breakfast. If my hypothesis is correct, then students should eat breakfast every morning so they can remember things in class better.

I think the hardest part of designing this experiment is to come up with a research question.