My thoughts past these days......

well, today is the second time i'm writing this and i have a lot of thoughts so far....
I was reading the book called How to bluff your way in science and i gotta admit it was pretty interesting about recognizing a scientist and knowing how many people have actually made this world more civilized than years ago!
I also had lots of thoughts while seeing a model rocket shoot up when my science teacher was demonstrating the use of carbon dioxide. Why doesn't scientist use anything that dissolves inside a rocket and add water in it so carbon dioxide is formed and therefore it will burst????Is it because they will have to waste a lot of money?Is it because it will waste to much water????
Anyway, i figured out probably it's because the rocket is way too big to store water and dissolving substances and besides i don't disagree upon the fact of using liquidized hydrogen and oxygen to send a rocket to space, i think it is a great idea!