Hi

I apologise for yet another change of mind, but this one will be the last mostly because this is my last chance to change it.
I got a hint that my last aim was far too complicated and frankly i agree. So now I will be testing different methods of water filtering such as clay, sand, fine sieve and iodine.

My aim is To investigate various methods of filtering unclean water

My hypothesis (which obviously needs more work) is That iodine will purify the water of germs but will not remove particles larger than microscopic.

Um, my materials I think will be clay, sand, iodine and a fine sieve for now but I will research other materials theoretically used for water filteration, beakers and an apparatus that will hold up the filtering equipment while the water passes through. Oh, and something like an ultra sensitive microscope to look at the filtered water.