Separating Mixtures Experiment Worksheet

Science experiments lesson 19: Separating mixtures: filter muddy water · Set 678 · 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.🫗 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
2. 2.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it dissolves (c) it floats on top (d) it sinks to the bottom
3. 3.⚖️ 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 keep it the same (c) we change it
4. 4.True or false: bran from wheat flour is done by evaporating. (a) False (b) True
5. 5.🧺 Do we need a magnet for the muddy water filter? (a) not needed (b) needed
6. 6.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sugar (b) it turns to sand (c) no, salt passes through (d) yes, all of it
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) a mirror (c) a funnel (d) sand and pebbles
9. 9.🫗 How do we separate tea leaves from tea? (a) filtering (b) winnowing (c) handpicking (d) evaporating
10. 10.True or false: tea leaves from tea is done by sieving. (a) True (b) False
11. 11.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is hot (c) clear water is salty (d) germs are invisible
12. 12.🧺 Do we need turmeric powder 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? Which of these is the one thing we change? (a) the same glass (b) the filter material (c) how clear the water is (d) the amount poured
14. 14.🧺 Do we need yeast for the muddy water filter? (a) not needed (b) needed
15. 15.🧺 Do we need a balloon for the muddy water filter? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) muddy water (c) cotton or cloth (d) yeast
17. 17.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) a battery cell (c) a balloon (d) sand and pebbles
18. 18.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is kept the same. (a) True (b) False
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is the one thing we change. (a) True (b) False
20. 20.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) cotton or cloth (c) a funnel (d) a balloon
21. 21.True or false: muddy water is not needed for the muddy water filter. (a) False (b) True
22. 22.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
23. 23.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) nothing (c) the mud (d) the salt
24. 24.🫗 How do we separate mud from water? (a) sieving (b) evaporating (c) filtering (d) winnowing
25. 25.🫗 Why does filtered muddy water look clearer? (a) the filter traps mud (b) the mud dissolves (c) the filter adds soap (d) the water evaporates
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same funnel (b) the same glass (c) how clear the water is (d) the same muddy water
27. 27.True or false: gravel from fine sand is done by sieving. (a) True (b) False
28. 28.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) hot (c) muddier (d) clearer
29. 29.⚖️ 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 change it (c) we measure it
30. 30.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) turmeric powder (c) muddy water (d) cotton or cloth
31. 31.True or false: sugar from sugar water is done by filtering. (a) True (b) False
32. 32.True or false: chaff from wheat grain is done by filtering. (a) True (b) False
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is what we measure. (a) False (b) True
34. 34.🧺 Which of these is not needed for the muddy water filter? (a) turmeric powder (b) a clean glass (c) a funnel (d) cotton or cloth
35. 35.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) a clean glass (c) a mirror (d) muddy water
36. 36.True or false: chaff from wheat grain is done by winnowing. (a) False (b) True
37. 37.True or false: sand and pebbles is not needed for the muddy water filter. (a) True (b) False
38. 38.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) sand and pebbles (c) cotton or cloth (d) a magnet
39. 39.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is kept the same. (a) True (b) False
40. 40.⚖️ 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

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