Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 150 · 40 questions

What you do (Yellow or red?): 1. Mix turmeric powder with a little water into a paste and paint it on white paper strips; let them dry. 2. Put a drop of soap solution on one strip and a drop of lemon juice on another. 3. Write down the colour each drop makes. 4. Add lemon juice to the reddish spot and watch it change back.

1. 1.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
4. 4.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
5. 5.True or false: a comb is not needed for the turmeric test. (a) False (b) True
6. 6.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) salt water (d) detergent water
7. 7.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) white at once (d) green
8. 8.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) soap solution (c) lemon juice (d) turmeric powder
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns yellow again (d) it turns darker red
11. 11.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) bright blue (d) reddish-brown
12. 12.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) sip each liquid (d) use only kitchen items
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.True or false: salt water is neutral. (a) False (b) True
15. 15.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
17. 17.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
18. 18.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) soap solution (d) baking soda water
19. 19.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the turmeric paper (c) the colour we see (d) the liquid we test
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) soap solution (c) lemon juice (d) a dropper or spoon
22. 22.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) tamarind water (d) baking soda water
23. 23.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns black (d) it turns blue
24. 24.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
25. 25.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
26. 26.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) lemon juice
27. 27.🔍 Which is the odd one out? (a) plain water (b) salt water (c) vinegar (d) baking soda water
28. 28.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) turmeric powder (c) a dropper or spoon (d) white paper strips
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
31. 31.True or false: lemon juice is a base. (a) False (b) True
32. 32.True or false: soap solution is needed for the turmeric test. (a) True (b) False
33. 33.🫧 Which of these is an acid? (a) tamarind water (b) plain water (c) baking soda water (d) soap solution
34. 34.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) detergent water (c) sugar water (d) plain water
35. 35.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) vinegar (c) tamarind water (d) salt water
36. 36.🫧 Which of these is an acid? (a) detergent water (b) sugar water (c) baking soda water (d) vinegar
37. 37.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
38. 38.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
39. 39.True or false: vinegar keeps turmeric yellow. (a) True (b) False
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False

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