Water Purifier Challenge: Which Material Cleans Dirty Water Best?
Plants and the Environment
Jayneel Patel
Ashwath Gooty
Atharva Goteti
- Grade:
- 1
- Teacher:
- Deepaben Patel
Clean water is very important for staying healthy. Sometimes water in nature looks dirty and has mud and small particles in it. We wanted to learn how water can be cleaned using simple materials. What cleans dirty water the best — rocks, charcoal, sand, or all three together?

Excellent investigation into how different materials filter dirty water! Your experiment was well organized, and I was impressed by how clearly you explained your variables and results. The clarity scoring system and graph made your findings easy to understand. You also connected your results to real water treatment systems, which shows strong real-world thinking. Next time, you could measure clarity with even more precise tools or test additional layers. Keep solving real-world problems with science. Good job!
You did a great job choosing an important problem clean water! I liked how clearly you explained your question, showed your materials and steps, and included pictures and a results table. Your “all three together” idea makes sense, and your conclusion matched your results. Great work!