 your results
Sent in by:
Jaban of Greene, ME and Cara of Maple Plain, MN
Hydro-neers wanted. Invent a filter to clean dirty water.
- 2-liter soda bottle cut in half (by an adult)
- napkins or paper towels
- gravel, sand and cotton balls for your filter
- dirty water, you can make it by adding cooking oil, food coloring, pieces of paper, and tiny pieces of Styrofoam to water
- Put the top half of the soda bottle upside-down (like a funnel) inside the bottom half. The top half will be where you build your filter; the bottom half will hold the filtered water.
- Layer the filter materials inside the top half of the bottle. Think about what each material might remove from the dirty water and in what order you should layer the materials. For an added challenge, use only two of materials to build your filter.
- Pour the dirty water through the filter. What does the filtered water look like?
- Take the filter apart and look at the different layers. Can you tell what each material removed from the water?
- Wipe the bottle clean and try again. Try putting materials in different layers or using different amounts of materials.
Now it's time to experiment. Think of a question you want answered. Like, are there better materials for cleaning water? Be sure to predict what you think is going to happen. Then, test it out using different materials and send your reports in to our special feedback area. Every week, we'll publish a whole bunch.
Amanda, age 11 of Fleetwood, PA wrote:
It worked pretty good, because we had a competition in or class to see who had the clearest filter and my group got 2nd place.
Briana, age 10 of Killingly, CT wrote:
my water filter partly worked beacuse the dirt fell through the bottem so when the water driped through it made it dirty.
Taha of ON wrote:
Well, I tried doing it with cotton, coffee filters, and sponge. Unfortunately, it didn't work... I don't know how you guys got it to work.
Simon+Victoria, age 11 of Melbourne wrote:
It was so clear, that I drank it!!!
Mandy, age 14 of Charlotte, NC wrote:
the water was cloudy but looked okay. I had to do it for a project
Stephanie, age 10 of Manchester, NH wrote:
it came out very clear!!! I thought it would not work as well as it did I hope you try it out for a school water bookreport it works great I hope it works as good as it worked for tell me how it goes!!!
Jj, age 12 of New York wrote:
when I put the dirty water in it made it clen
Andres, age 11 of Norwalk, CT wrote:
It came out AWESOME it was the BEST expirament that I ever did in my LIFE!!!
Felicia, age 11 wrote:
it was quite clean. but is the can the water be drunk and how do we test that the water is safe for drinking?
Diana, age 11 of South Hill, VA wrote:
The water became completely clean, but still had some speckles of tissue in it
Marr, age 12 of FL wrote:
it was awsem I did evrithing okay and the water came aut crystal clear
Wyees, Xavier & Kendall of Chicago wrote:
It came out alright we had 2 use different materials though paper towels, cotton balls, gravel and mesh wire it came out fine. We didi this 4 our science project so i mean if u want good quality u need 2 have good materials
Loren of Kenner, LA wrote:
well I put the gravel first then sand the cotton balls to take away the food coloring... I came out perfect im a junior in high school and this worked out so well thanx zoom!
Leroy, age 13 of Jacksonville, FL wrote:
i mxed oil in some water and poored sand in the bottle and then I shook it up the I poored in the my filter and it came out crystal clear
Phoebe, age 9 of Bristel wrote:
the water was very very clean at the end of the experiment
Henry, age 9 of Coquitlam, BC wrote:
When I poured the water through the filter, it came out crystal clear! I used cotton at the top, gravel at the middle, sand at the bottom, and paper towels at the bottom. Cool!
Samantha, age 11 of ME wrote:
I used rocks, sand, cloth, sponges, gauses, but the material that worked the best was the sponges, the cloth and the gauses.
Stacy, age 16 of Baltimore, MD wrote:
When I first did it the water was cstilla little dirty then I tried the next trail the was was refreshing and clean
Kd, age 11 of WI wrote:
it worked ok. I need better materials though. if I try it in summer it would work good because I could get sand
Molly, age 15 of San Diego, CA wrote:
it came out totaly clear!!! it was amazing!!! what happened when you guys tried it?
Annie, age 8 of Bend, OR wrote:
it was ok... I didn't come out all clear but it was pretty clear.
Kaomii of Blandford Forum, UK wrote:
I printed the instructions for school and we did it as a class project and everyones was crystal clear! They were so amazed!!!
Keyshia, age 4 of Hawaii wrote:
well first it was dirty then when the tryed it again the h2o was clear but still a little dirty
Amal, age 12 of Toronto, ON wrote:
I tried the experiment and it went great! I didn't finish but I was just wondering what you can use to separate the food coloring and salt? Please can you give me an answer?!
Cooper, age 12 of Sunderland, MA wrote:
it worked fine at home. the water was clear. it did not woke as nice st school.
A.J., age 12 of Toronto, ON wrote:
it didn;t work, the water stayed th same!!!
Jessica, age 11 of Naples, FL wrote:
When I first did the expirement it worked out not very good but the second time was perfect so if you are doing it for a science fair I suggest keeping two containers of dirty water instead of one!
Claudia, age 12 wrote:
The water was clean
Jacod, age 11 of Naples, FL wrote:
The Expirement was for my science fair expirement and it turned out real well and very nicely. The finishing water was much more clear and clean than before I put it in the filter!
Sisqo of Philadelphia, PA wrote:
It was so awesome when I tried. It came out so clear and clean. Thank you so much ZOOM you guys are the best.
Brayin, age 4 of Indianapolis, IN wrote:
Here is what we used cotton, rocks, a little sand, more cotton then add drity water. Guess what the experiment worked. Then the water was filtered out.
Garrett wrote:
It keep the particles from geting to the water.
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