Ok, I'm a bit stressed because of lack of information in a project, and I really need some resources for this. I'm in a group with a project where we're supposed to find the amount of oxygen in an outdoor pool. There's a lot of chemistry in this, but we're also supposed to have a physics part in this too. Unfortunately, we were not able to get information quickly enough for this, and therefore I'm stressed now. I talked to the physics-teacher today, and he suggested us to concentrate on temperatures, and the relation between density and pressure. Also, the "mixing ratio" could be interesting. (PS: unfortunately, we could only get data from a depth of 4 meters, so the temperature-fluctuations were about a half degree C. Therefore I'm unsure if it is no point in talking about temperature...?) My question is if there are some on this board that by coincidence have a few resources/links where I can get good info about this. My knowledge in this part of physics is equal to zero, so please don't put up some really advanced stuff. (And I know, I should use google, but I have serious trouble with time, so I thought I could use the "short-cut" by posting here, sorry if I shouldn't) (PS: There are no vegetation in the pool) Thank you in advance.