Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 538 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
2. 2.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
3. 3.True or false: a mirror is needed for the turmeric test. (a) True (b) False
4. 4.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
5. 5.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) sugar water
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a balloon (c) soap solution (d) water
7. 7.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
8. 8.⚖️ 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
9. 9.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) plain water
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) soap solution (d) a comb
11. 11.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) vinegar
12. 12.🫧 Which of these is neutral? (a) detergent water (b) plain water (c) orange juice (d) soap solution
13. 13.⚖️ 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 liquid we test (d) the colour we see
14. 14.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
15. 15.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water
16. 16.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
17. 17.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
18. 18.True or false: sugar water is neutral. (a) False (b) True
19. 19.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) green (d) bright blue
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the light we look in (c) the colour we see
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
22. 22.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a battery cell (c) a balloon (d) a comb
23. 23.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
24. 24.🫧 Which of these is neutral? (a) tamarind water (b) curd (c) soap solution (d) salt water
25. 25.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) detergent water (d) sugar water
26. 26.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) salt water (d) tamarind water
27. 27.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) soap solution (d) yeast
28. 28.True or false: yeast is not needed for the turmeric test. (a) True (b) False
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
31. 31.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
32. 32.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) salt water (c) plain water (d) tamarind water
33. 33.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is an acid (d) soap is hot
34. 34.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
35. 35.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
37. 37.True or false: vinegar is neutral. (a) False (b) True
38. 38.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) soap solution (c) white paper strips (d) a mirror

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