We have to make a vidoe of this for school and we are stuck. What is the difference of chemistry in diet soft drink and regular soft drinks?

Look up aspertame first and see what chemical that is. In some countries it is used as an insect killer. Then look up sugar and see what chemical that is. The diet soda is essentially a poison or an exotoxin and affects the body in weird ways. It can lead to obesity and diabetes getting totally out of whack. Google aspertame and reserch the health diseases this can cause. It can also cause problems with the brain and cancer. You'll never drink a diet soda again if you properly research aspertame. Good luck on your video. Hopefully you will wake up the other kids to the health hazards as well.