Separating Mixtures Experiment Worksheet

Science experiments lesson 19: Separating mixtures: filter muddy water · Set 750 · 40 questions

What you do (Choose the right way): 1. Put cotton or cloth in the funnel, then layers of sand and small pebbles. 2. Stand the funnel in a clean glass. 3. Pour muddy water in slowly and watch what drips out. 4. Compare the colour before and after — never drink it — and wash your hands.

1. 1.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the same funnel
2. 2.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) True (b) False
3. 3.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) cotton or cloth (c) a balloon (d) a battery cell
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.🫗 How do we separate gravel from fine sand? (a) sieving (b) filtering (c) winnowing (d) evaporating
7. 7.🧺 Do we need a clean glass for the muddy water filter? (a) needed (b) not needed
8. 8.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, always (c) yes, if it is cold (d) no, germs may stay
9. 9.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) a clean glass (c) muddy water (d) a balloon
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same funnel (b) how clear the water is (c) the same muddy water (d) the same glass
11. 11.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) muddy water (c) turmeric powder (d) cotton or cloth
12. 12.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) the filter material (c) the same funnel (d) how clear the water is
14. 14.True or false: a magnet is not needed for the muddy water filter. (a) False (b) True
15. 15.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) yeast (b) cotton or cloth (c) a funnel (d) a clean glass
17. 17.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wash hands afterwards (c) wipe hands on face (d) nothing is needed
18. 18.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) nothing (c) the salt (d) the mud
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) both stay behind (c) leaves stay behind (d) leaves pass through
21. 21.🧺 Do we need yeast for the muddy water filter? (a) needed (b) not needed
22. 22.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) clearer (c) salty (d) muddier
23. 23.True or false: bran from wheat flour is done by filtering. (a) False (b) True
24. 24.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a battery cell (c) a magnet (d) a clean glass
25. 25.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
26. 26.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the mud dissolves (c) the filter adds soap (d) the filter traps mud
27. 27.🫗 Which of these is done by winnowing? (a) salt from sea water (b) mud from water (c) gravel from fine sand (d) husk from rice grain
28. 28.True or false: salt from sea water is done by handpicking. (a) False (b) True
29. 29.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
31. 31.🫗 How do we separate chaff from wheat grain? (a) handpicking (b) sieving (c) evaporating (d) winnowing
32. 32.True or false: bad grains from rice is done by filtering. (a) False (b) True
33. 33.True or false: small stones from dal is done by handpicking. (a) False (b) True
34. 34.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is the one thing we change. (a) False (b) True
35. 35.True or false: a battery cell is not needed for the muddy water filter. (a) True (b) False
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is kept the same. (a) True (b) False
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) False (b) True
38. 38.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) germs are invisible (c) clear water is salty (d) clear water is hot
39. 39.True or false: sugar from sugar water is done by winnowing. (a) True (b) False
40. 40.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it floats on top (c) it dissolves (d) it sinks to the bottom

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