Separating Mixtures Experiment Worksheet

Science experiments lesson 19: Separating mixtures: filter muddy water · Set 451 · 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 filter material”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🛟 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
3. 3.True or false: a battery cell is not needed for the muddy water filter. (a) False (b) True
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a magnet (c) a mirror (d) sand and pebbles
6. 6.True or false: cotton or cloth is needed for the muddy water filter. (a) True (b) False
7. 7.🔍 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
8. 8.🫗 Which of these is done by sieving? (a) chaff from wheat grain (b) bad grains from rice (c) gravel from fine sand (d) salt from sea water
9. 9.🔮 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
10. 10.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves stay behind (b) tea stays behind (c) both stay behind (d) leaves pass through
11. 11.⚖️ 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 measure it (c) we change it
12. 12.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a battery cell (c) cotton or cloth (d) sand and pebbles
13. 13.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
14. 14.True or false: a balloon is not needed for the muddy water filter. (a) False (b) True
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 funnel (b) the same glass (c) the amount poured (d) the filter material
16. 16.🫗 Which of these is done by evaporating? (a) mud from water (b) husk from rice grain (c) bran from wheat flour (d) salt from sea water
17. 17.🫗 How do we separate gravel from fine sand? (a) handpicking (b) evaporating (c) filtering (d) sieving
18. 18.🧺 Do we need a balloon for the muddy water filter? (a) needed (b) not needed
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) True (b) False
20. 20.🧺 Which of these is not needed for the muddy water filter? (a) a mirror (b) cotton or cloth (c) muddy water (d) a clean glass
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) the same muddy water (c) the filter material (d) how clear the water is
22. 22.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) a balloon (c) sand and pebbles (d) cotton or cloth
23. 23.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the water (c) nothing (d) the mud
24. 24.🫗 Is filtered pond water safe to drink? (a) no, germs may stay (b) yes, if it is clear (c) yes, always (d) yes, if it is cold
25. 25.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wash hands afterwards (d) wipe hands on face
26. 26.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter traps mud (c) the mud dissolves (d) the filter adds soap
27. 27.🫗 How do we separate chaff from wheat grain? (a) sieving (b) handpicking (c) filtering (d) winnowing
28. 28.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a magnet (b) a funnel (c) sand and pebbles (d) cotton or cloth
29. 29.🫗 Which of these is done by evaporating? (a) bad grains from rice (b) gravel from fine sand (c) husk from rice grain (d) sugar from sugar water
30. 30.⚖️ 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 keep it the same (b) we measure it (c) we change it
31. 31.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a balloon (c) muddy water (d) turmeric powder
32. 32.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) sand and pebbles (c) muddy water (d) a balloon
33. 33.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a battery cell (c) a clean glass (d) turmeric powder
34. 34.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is what we measure. (a) True (b) False
35. 35.⚖️ 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 keep it the same (c) we change it
36. 36.True or false: bad grains from rice is done by handpicking. (a) True (b) False
37. 37.🫗 Which of these is done by sieving? (a) sugar from sugar water (b) tea leaves from tea (c) bran from wheat flour (d) mud from water
38. 38.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is the one thing we change. (a) False (b) True
39. 39.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) a battery cell (c) a clean glass (d) cotton or cloth
40. 40.True or false: turmeric powder is needed for the muddy water filter. (a) False (b) True

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