I am in 8th grade and i have a science fair coming up. it needs to be on earth science. i don't want anything dumb like a tornado in a bottle. but i don't want anything too hard either- like too many materials, or something that would take a few days to do (like to record data or something). i've looked on like every site that the internet has to offer. this is my my last resort.
thanx!
thanx!