Science project ideas?

Question

I'm in 8th Grade and I need an idea for a cool science experiment. it needs to be like (what is the effect of _____ on _____) I have a few ideas but they are kind of stupid, I need some help. I am open to any suggestions but i would prefer something that I could make money on and have a concrete, in your face kind of thing saying that this stuff actually applys, because frankly most people don't care about mold, they care about relationship (I need something that is set in stone, so this won't work, it nees to be able to be tested and get the same answer every time, so long as the conditions are exactly the same, there are no two people that are exactly the same) money, cause it effects everyone, or entertainment. All I want is an idea that effects people and not something like rust that MOST people don't care about. I want MY topic to be interesting. Plz don't post any comments than don't apply to the question, all i want are answers, not someone saying that what I want is imposable

Answer 1

The one I did was "At which angle do projectiles go the farthest?" Then I fired a water rocket and different angles 15, 30, 45, 60.
P.S. The answers 45 don't say its something else cause this is a proven fact by scientists.

Answer 2

no way is it Impossible I'm in high school now and in 3rd grade i went to state finals with the effects of fertilizer on seeds, which worked the best? i dint expect you to do that one. my idea for you is to find out what effect certain pest asides have an effect on our food we eat. can they cause health problems that we aren't aware of? what are the chances that you will get sick because of your food not being cared fore properly.you can also include the seminila and ecoli breakouts what caused that to happen? hope my idea is use full good luck!