1. Explain the most interesting scientific concepts you learned from this investigation. The most interesting scientific concept we learned was that boiling one of our methods proved to be the worst for us, but it is the best way out of the three for purified water. This is scientifically proven because during the boiling process the liquid changes state of matter, leaving behind the bacteria and the water evaporates leaving all the necessary unnecessary weight, also because most of the heat kills the bacteria. Ultraviolet light, on the other hand, only kills microbes, nothing else. Ultraviolet light is not very effective because it leaves bacterial remains in the water.2. Explain the scientific techniques and skills you used to conduct your investigation. The scientific techniques mainly used in conducting our investigation were the identification of bacteria through the use of a microscope, the creation of a simple distillation kit, the treatment of Petri dishes with agar on them with boiled, distilled or irradiated and calculating the bacterial coverage on the amount of treated area on the Petri dish. All these scientific techniques were a crucial part of our investigation. Without all these techniques we would not have been able to conduct such an effective experiment. Identifying the bacteria under the microscope was not easy since it was the first time we had identified bacteria. After one of our tests we poured a drop of water onto a slide and then added iodine and sodium because iodine helps the bacteria show more. Then we observed the water and recorded our qualitative observations, half of which came from observation under the microscope and the other half while we observed the water... half of a sheet of paper... millions of people every year, so that's 6,000 kids every day. Waterborne children are especially vulnerable to waterborne diseases. Their small bodies absorb a disproportionately large amount of water and its contaminants, and their immune systems are not equipped to fight bacteria such as E. Coli, Giardia and typhoid bacteria. Every year more than 2 million children die from these diarrheal diseases and 90% of them are children under five years old. Global warming is also exacerbating this crisis as severe and prolonged droughts dry up water supplies in arid regions and heavy rains cause sewage overflows. In terms of the number of people affected, the lack of access to drinking water and basic sanitation represents a huge problem. Yet it is a problem with several solutions. People who get sick from transmitted diseases, their body may not function very well.