Separating Mixtures Experiment Worksheet

Science experiments lesson 19: Separating mixtures: filter muddy water · Set 68 · 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.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is sweet (c) clear water is hot (d) germs are invisible
2. 2.🫗 Which of these is done by filtering? (a) salt from sea water (b) bran from wheat flour (c) gravel from fine sand (d) mud from water
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🫗 Which of these is done by evaporating? (a) bad grains from rice (b) small stones from dal (c) salt from sea water (d) bran from wheat flour
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 keep it the same (c) we measure it
6. 6.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) turmeric powder (b) a funnel (c) sand and pebbles (d) muddy water
7. 7.True or false: sand and pebbles is needed for the muddy water filter. (a) False (b) True
8. 8.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) both stay behind (c) leaves stay behind (d) tea stays behind
9. 9.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it turns to sand (c) it dissolves (d) it sinks to the bottom
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a magnet (c) yeast (d) a clean glass
12. 12.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the same funnel (c) the filter material
13. 13.⚖️ 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 glass (d) the same muddy water
14. 14.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) nothing is needed (d) wash hands afterwards
15. 15.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a magnet (c) muddy water (d) a clean glass
16. 16.🧺 Which of these is needed for the muddy water filter? (a) sand and pebbles (b) a balloon (c) a mirror (d) a magnet
17. 17.True or false: turmeric powder is not needed for the muddy water filter. (a) True (b) False
18. 18.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) sand and pebbles (c) cotton or cloth (d) a mirror
19. 19.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
20. 20.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.🫗 Is filtered pond water safe to drink? (a) yes, if it is cold (b) yes, if it is clear (c) no, germs may stay (d) yes, always
22. 22.🫗 How do we separate bad grains from rice? (a) winnowing (b) filtering (c) handpicking (d) sieving
23. 23.🫗 Why does filtered muddy water look clearer? (a) the mud dissolves (b) the filter adds soap (c) the filter traps mud (d) the water evaporates
24. 24.🫗 Which of these is done by handpicking? (a) mud from water (b) salt from sea water (c) small stones from dal (d) sugar from sugar water
25. 25.⚖️ 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
26. 26.🫗 Which of these is done by sieving? (a) chaff from wheat grain (b) bran from wheat flour (c) mud from water (d) husk from rice grain
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the filter material (c) the amount poured
28. 28.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) clearer (d) muddier
29. 29.⚖️ 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
30. 30.True or false: small stones from dal is done by sieving. (a) True (b) False
31. 31.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
32. 32.True or false: cotton or cloth is needed for the muddy water filter. (a) False (b) True
33. 33.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False
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) True (b) False
35. 35.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) muddy water (c) sand and pebbles (d) a balloon
36. 36.True or false: small stones from dal is done by filtering. (a) True (b) False
37. 37.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) it turns to sugar (c) no, salt passes through (d) yes, all of it
38. 38.🫗 Which of these is done by handpicking? (a) mud from water (b) bran from wheat flour (c) bad grains from rice (d) salt from sea water
39. 39.🧺 Do we need a magnet for the muddy water filter? (a) not needed (b) needed
40. 40.True or false: salt from sea water is done by winnowing. (a) True (b) False

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