Separating Mixtures Experiment Worksheet

Science experiments lesson 19: Separating mixtures: filter muddy water · Set 830 · 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.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the water evaporates (c) the mud dissolves (d) the filter traps mud
3. 3.🫗 Which of these is done by sieving? (a) bran from wheat flour (b) husk from rice grain (c) bad grains from rice (d) small stones from dal
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the same glass (c) the amount poured (d) the same funnel
5. 5.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
6. 6.⚖️ 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 glass (b) how clear the water is (c) the same muddy water (d) the filter material
7. 7.True or false: sand and pebbles is not needed for the muddy water filter. (a) False (b) True
8. 8.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) yeast (b) a clean glass (c) a funnel (d) muddy water
9. 9.True or false: a mirror is not needed for the muddy water filter. (a) False (b) True
10. 10.🫗 Which of these is done by evaporating? (a) bran from wheat flour (b) bad grains from rice (c) sugar from sugar water (d) mud from water
11. 11.🧺 Do we need a funnel for the muddy water filter? (a) needed (b) not needed
12. 12.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) salty (c) clearer (d) hot
15. 15.🫗 Which of these is done by handpicking? (a) husk from rice grain (b) mud from water (c) chaff from wheat grain (d) small stones from dal
16. 16.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) a battery cell (c) sand and pebbles (d) a mirror
17. 17.True or false: husk from rice grain is done by sieving. (a) True (b) False
18. 18.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is cold (c) yes, if it is clear (d) no, germs may stay
19. 19.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) cotton or cloth (c) muddy water (d) a magnet
20. 20.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) leaves stay behind (c) tea stays behind (d) both stay behind
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we keep it the same (c) we measure it
22. 22.True or false: mud from water is done by evaporating. (a) True (b) False
23. 23.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) nothing is needed (c) wipe hands on face (d) lick your fingers
24. 24.True or false: a magnet is not needed for the muddy water filter. (a) True (b) False
25. 25.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
26. 26.True or false: a clean glass is needed for the muddy water filter. (a) True (b) False
27. 27.True or false: a balloon is needed for the muddy water filter. (a) False (b) True
28. 28.True or false: gravel from fine sand is done by sieving. (a) False (b) True
29. 29.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) yeast (c) a mirror (d) cotton or cloth
30. 30.⚖️ 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
31. 31.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) turmeric powder (b) a clean glass (c) muddy water (d) cotton or cloth
32. 32.True or false: a funnel is needed for the muddy water filter. (a) True (b) False
33. 33.True or false: turmeric powder is needed for the muddy water filter. (a) True (b) False
34. 34.🫗 How do we separate salt from sea water? (a) sieving (b) winnowing (c) evaporating (d) filtering
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) False (b) True
36. 36.True or false: sugar from sugar water is done by handpicking. (a) True (b) False
37. 37.🧺 Which of these is not needed for the muddy water filter? (a) yeast (b) muddy water (c) cotton or cloth (d) a funnel
38. 38.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) turmeric powder (c) sand and pebbles (d) a funnel
39. 39.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it sinks to the bottom (c) it floats on top (d) it dissolves
40. 40.True or false: a battery cell is not needed for the muddy water filter. (a) False (b) True

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