Separating Mixtures Experiment Worksheet

Science experiments lesson 19: Separating mixtures: filter muddy water · Set 850 · 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? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a clean glass (c) muddy water (d) a magnet
3. 3.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
4. 4.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) turmeric powder (b) a clean glass (c) cotton or cloth (d) sand and pebbles
5. 5.🫗 How do we separate bran from wheat flour? (a) sieving (b) filtering (c) winnowing (d) handpicking
6. 6.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) muddy water (c) cotton or cloth (d) yeast
7. 7.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the mud (c) the water (d) the salt
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) a battery cell (c) turmeric powder (d) yeast
10. 10.True or false: cotton or cloth is not needed for the muddy water filter. (a) True (b) False
11. 11.🫗 How do we separate salt from sea water? (a) sieving (b) winnowing (c) handpicking (d) evaporating
12. 12.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
14. 14.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is what we measure. (a) False (b) True
15. 15.🧺 Do we need yeast for the muddy water filter? (a) needed (b) not needed
16. 16.🛟 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
17. 17.⚖️ 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 same glass
18. 18.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) wipe hands on face (c) nothing is needed (d) lick your fingers
19. 19.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) muddier (d) clearer
20. 20.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
21. 21.True or false: sand and pebbles is needed for the muddy water filter. (a) True (b) False
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same muddy water (b) the amount poured (c) how clear the water is (d) the filter material
23. 23.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a mirror (b) a clean glass (c) sand and pebbles (d) a funnel
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is what we measure. (a) False (b) True
25. 25.🫗 How do we separate bad grains from rice? (a) filtering (b) winnowing (c) sieving (d) handpicking
26. 26.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) yeast (c) sand and pebbles (d) a battery cell
27. 27.🧺 Which of these is not needed for the muddy water filter? (a) a magnet (b) sand and pebbles (c) a clean glass (d) muddy water
28. 28.⚖️ 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 same glass (c) the filter material (d) the amount poured
29. 29.⚖️ 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
30. 30.🫗 Which of these is done by filtering? (a) mud from water (b) sugar from sugar water (c) small stones from dal (d) husk from rice grain
31. 31.🫗 Which of these is done by sieving? (a) bran from wheat flour (b) husk from rice grain (c) small stones from dal (d) salt from sea water
32. 32.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it dissolves (c) it turns to sand (d) it sinks to the bottom
33. 33.True or false: a mirror is not needed for the muddy water filter. (a) False (b) True
34. 34.⚖️ 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
35. 35.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
36. 36.🫗 How do we separate gravel from fine sand? (a) handpicking (b) sieving (c) evaporating (d) filtering
37. 37.True or false: bran from wheat flour is done by handpicking. (a) False (b) True
38. 38.🫗 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
39. 39.🫗 Why does filtered muddy water look clearer? (a) the mud dissolves (b) the water evaporates (c) the filter traps mud (d) the filter adds soap
40. 40.True or false: gravel from fine sand is done by sieving. (a) True (b) False

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