Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 616 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a mirror (c) turmeric powder (d) soap solution
2. 2.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) vinegar (c) soap solution (d) plain water
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
5. 5.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is magnetic (d) soap is an acid
6. 6.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) baking soda water (d) sugar water
7. 7.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) detergent water (c) vinegar (d) sugar water
8. 8.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) tamarind water
9. 9.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) bright blue (d) green
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the light we look in (c) the turmeric paper (d) the number of drops
11. 11.🫧 Which of these is neutral? (a) detergent water (b) sugar water (c) tamarind water (d) soap solution
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) white paper strips (c) lemon juice (d) water
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.True or false: tamarind water is an acid. (a) False (b) True
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
18. 18.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
19. 19.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
20. 20.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) baking soda water (c) lemon juice (d) tamarind water
22. 22.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
23. 23.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a dropper or spoon (d) a comb
25. 25.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a magnet (c) a battery cell (d) a mirror
26. 26.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) tamarind water
27. 27.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
28. 28.🫧 Which of these is a base? (a) tamarind water (b) lemon juice (c) plain water (d) soap solution
29. 29.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
30. 30.True or false: soap solution keeps turmeric yellow. (a) True (b) False
31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) a battery cell (d) a dropper or spoon
33. 33.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) soap solution (d) baking soda water
34. 34.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) plain water (b) lemon juice (c) soap solution (d) vinegar
36. 36.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) turmeric powder (c) water (d) lemon juice
37. 37.True or false: salt water is neutral. (a) True (b) False
38. 38.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
39. 39.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
40. 40.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed

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