What I think now: When you snap a glow stick it will start to glow and become bright because of chemicals.
What I think now: That there is a tube in the glow stick with chemicals in it so when it snaps they come out and cause a chemicals reaction that what makes it glow
What I think now: It is a just yellow liquid and when you brake the glass tube the chemicals come out and mix together and form a glow
The chemicals in a glow stick is dye and diphenyl oxalate is in the plastic. and hydrogen peroxide is in the glass tube.
Synthesis is when you start something like i did here and when you research more you know more and more knowledge.