Separating Mixtures Experiment Worksheet

Science experiments lesson 19: Separating mixtures: filter muddy water · Set 806 · 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 poured through a cloth filter. What stays on the cloth? (a) nothing (b) the water (c) the salt (d) the mud
2. 2.True or false: bran from wheat flour is done by sieving. (a) False (b) True
3. 3.⚖️ 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 same muddy water (d) the same funnel
4. 4.🫗 Which of these is done by winnowing? (a) bad grains from rice (b) chaff from wheat grain (c) sugar from sugar water (d) mud from water
5. 5.🫗 How do we separate salt from sea water? (a) evaporating (b) sieving (c) handpicking (d) filtering
6. 6.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
7. 7.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) muddier (c) clearer (d) hot
8. 8.🫗 Which of these is done by sieving? (a) tea leaves from tea (b) gravel from fine sand (c) mud from water (d) sugar from sugar water
9. 9.🧺 Do we need turmeric powder for the muddy water filter? (a) needed (b) not needed
10. 10.🧺 Do we need a magnet for the muddy water filter? (a) not needed (b) needed
11. 11.🔍 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
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 change it (b) we keep it the same (c) we measure it
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) a battery cell (c) muddy water (d) sand and pebbles
15. 15.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) no, germs may stay (c) yes, if it is cold (d) yes, always
16. 16.True or false: a balloon is not needed for the muddy water filter. (a) True (b) False
17. 17.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) a clean glass (c) turmeric powder (d) muddy water
18. 18.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves stay behind (b) tea stays behind (c) leaves pass through (d) both stay behind
19. 19.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is sweet (d) clear water is hot
20. 20.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) turmeric powder (c) a clean glass (d) sand and pebbles
21. 21.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the mud dissolves (c) the filter adds soap (d) the filter traps mud
22. 22.True or false: cotton or cloth is not needed for the muddy water filter. (a) False (b) True
23. 23.⚖️ 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 measure it (c) we keep it the same
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) False (b) True
25. 25.⚖️ 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
26. 26.⚖️ 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) True (b) False
27. 27.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) a magnet (c) muddy water (d) cotton or cloth
28. 28.🫗 How do we separate chaff from wheat grain? (a) handpicking (b) winnowing (c) evaporating (d) sieving
29. 29.⚖️ 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 muddy water (c) the filter material
30. 30.🧺 Which of these is not needed for the muddy water filter? (a) a clean glass (b) a battery cell (c) muddy water (d) sand and pebbles
31. 31.True or false: cotton or cloth is needed for the muddy water filter. (a) True (b) False
32. 32.🫗 How do we separate gravel from fine sand? (a) handpicking (b) evaporating (c) winnowing (d) sieving
33. 33.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) cotton or cloth (c) a magnet (d) a balloon
34. 34.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a balloon (b) a funnel (c) cotton or cloth (d) muddy water
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.True or false: a clean glass is not needed for the muddy water filter. (a) True (b) False
37. 37.True or false: salt from sea water is done by handpicking. (a) False (b) True
38. 38.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is what we measure. (a) False (b) True
39. 39.True or false: a balloon is needed for the muddy water filter. (a) False (b) True
40. 40.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed

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