The aim of this experiment is to find out which removes stains from plates the fastest. The dependent variable is how fast the stains are removed with each type of water. The independent variable is if stains are more easily removed with each of the types of water

I think that as long as the amount of stains on each plate are almost the same, soapy water will get the fastest time, fresh water will be the slowest and the salty water will also be slower then soapy water.

1. 200mLs of water

2. A phone or stopwatch

3. 5 grams of salt

4. 5mLs of dishwashing detergent

5. Plates

6. A sponge

7. Measuring cup

8. Honey

• A possible infection - If you have a open wound, do not put the wound near salty or soapy water and can cause infections.

• Sickness/Illness - Use soap and rinse your hands with fresh water after completing the experiment

• Developing a disease - Do not inhale or consume salty or soapy water as it can lead to dire consequences

1. Collect all needed equipment and materials mentioned in materials and place them near the sink.

2. get three plate and smear similar amounts of jam on each of them.

3. use the measuring cup to get 200mLs of water.

4. put the first dish in the sink and get your timer ready

5. start timer as you start pouring fresh water on the plate and start scrubbing the plate with a sponge.

6. after finishing cleaning the plate, stop timer, record results and put the plate to the side.

7. get second dish and put into sink, repeat steps 4-5 but use salty water this time.

8. get third dish and put into sink, repeat steps 4-5 but use soapy water this time.

9. repeat all steps once more to get more accurate results

10. check all results and see which was the fastest.

The original goal of finding out which of the three types of water removed stains faster was achieved with as much accuracy as possible in this experiment. As I expected soapy water came out on top with the fastest time of 5.26 and 5.19 seconds in the tests, unexpectedly though freshwater was faster then salty water by a couple of milliseconds. They are both quick enough to use for everyday cleaning but can't kill the germs or bacteria and they can't clean as fast as the dishwashing detergent and don't completely get rid of the stains. Which meant if a person used that same plate that wasn't cleaned properly, they will probably get sick if they eat from that plate. The results were a little different to what I expected but the experiment still went well in both attempts. A massive weakness in my experiment was that the amount of stains wasn't a controlled variable and could affect the end results as well as the accuracy of those results. Getting the exact time by myself wasn't easy as I had to start the timer at the same time as I started washing the plate, and then I also had to stop the timer when i finished. These results and data could be useful to people who want to easily and efficiently clean their things as the results show that dishwashing and laundry detergent can clean their clothes and dishes better then freshwater and salty water could. This will definitely help other save time and kill all the germs and bacteria that could cause harm to them. I could have improved this experiment by repeating the same experiment once more, using something else as stains to be more accurate like a specific amount of a liquid that stains things easily. I could of also asked for some help when doing the experiment to make it easier and more reliable especially with the help of a teacher, parent or an older sibling. An experiment that people may want to investigate after this one, is if soapy water actually kills bacteria and germs, and if they do, how much? Another experiment may be if salty water can be used to clean yourself efficiently or if salty water can kills germs and bacteria. Another experiment that may sprout from mine is how fast freshwater can clean objects that are stained with different things by itself.

The experiment went somewhat well and I was able to get some results. In the end, my hypothesis was almost correct with how I guessed that soapy water would be faster then the others, but wrong with freshwater being the slowest.

• https://www.insider.com/guides/health/does-dish-soap-kill-germs

Images:

• https://i.ytimg.com/vi/qRClKxzJX9A/hqdefault.jpg or https://www.youtube.com/watch?v=qRClKxzJX9A

• https://www.dreamstime.com/soapy-water-sink-macro-shot-image117905430