Separating Mixtures Experiment Worksheet

Science experiments lesson 19: Separating mixtures: filter muddy water · Set 43 · 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.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it dissolves (b) it floats on top (c) it turns to sand (d) it sinks to the bottom
2. 2.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a clean glass (c) cotton or cloth (d) a battery cell
3. 3.⚖️ 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 measure it (c) we keep it the same
4. 4.🫗 How do we separate gravel from fine sand? (a) winnowing (b) filtering (c) evaporating (d) sieving
5. 5.🧺 Which of these is needed for the muddy water filter? (a) cotton or cloth (b) a battery cell (c) turmeric powder (d) yeast
6. 6.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the amount poured (b) the same muddy water (c) the filter material (d) how clear the water is
7. 7.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) leaves pass through (c) tea stays behind (d) leaves stay behind
8. 8.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the water evaporates (c) the filter traps mud (d) the mud dissolves
9. 9.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is hot (d) clear water is sweet
10. 10.🧺 Do we need a balloon for the muddy water filter? (a) not needed (b) needed
11. 11.⚖️ 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
12. 12.🫗 How do we separate salt from sea water? (a) winnowing (b) evaporating (c) filtering (d) handpicking
13. 13.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is clear (c) yes, if it is cold (d) no, germs may stay
14. 14.True or false: a funnel is not needed for the muddy water filter. (a) True (b) False
15. 15.⚖️ 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) how clear the water is (d) the amount poured
16. 16.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) sand and pebbles (c) a balloon (d) a magnet
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) True (b) False
18. 18.🫗 Which of these is done by evaporating? (a) tea leaves from tea (b) gravel from fine sand (c) sugar from sugar water (d) mud from water
19. 19.True or false: turmeric powder is needed for the muddy water filter. (a) True (b) False
20. 20.🫗 Which of these is done by sieving? (a) salt from sea water (b) chaff from wheat grain (c) gravel from fine sand (d) mud from water
21. 21.True or false: sugar from sugar water is done by sieving. (a) False (b) True
22. 22.True or false: small stones from dal is done by evaporating. (a) False (b) True
23. 23.🫗 Which of these is done by sieving? (a) tea leaves from tea (b) bran from wheat flour (c) bad grains from rice (d) sugar from sugar water
24. 24.True or false: a balloon is not needed for the muddy water filter. (a) False (b) True
25. 25.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) wash hands afterwards (d) nothing is needed
26. 26.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) yes, all of it (b) it turns to sand (c) it turns to sugar (d) no, salt passes through
27. 27.🧺 Do we need a funnel for the muddy water filter? (a) needed (b) not needed
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True
29. 29.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a clean glass (c) cotton or cloth (d) a balloon
30. 30.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the salt (c) nothing (d) the water
31. 31.🫗 Which of these is done by filtering? (a) gravel from fine sand (b) small stones from dal (c) mud from water (d) chaff from wheat grain
32. 32.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
33. 33.True or false: bran from wheat flour is done by handpicking. (a) False (b) True
34. 34.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) muddy water (c) a clean glass (d) turmeric powder
35. 35.🫗 How do we separate mud from water? (a) winnowing (b) handpicking (c) filtering (d) sieving
36. 36.🧺 Do we need turmeric powder for the muddy water filter? (a) needed (b) not needed
37. 37.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) a battery cell (c) yeast (d) a balloon
38. 38.🧺 Do we need a clean glass for the muddy water filter? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a mirror (b) sand and pebbles (c) a clean glass (d) a funnel
40. 40.🫗 Which of these is done by filtering? (a) salt from sea water (b) tea leaves from tea (c) husk from rice grain (d) small stones from dal

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