Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 719 · 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? True or false: the liquid we test is kept the same. (a) False (b) True
2. 2.🫧 Which of these is an acid? (a) sugar water (b) detergent water (c) lemon juice (d) soap solution
3. 3.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) soap solution (d) baking soda water
4. 4.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap is an acid (d) soap water is a base
5. 5.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) water (d) a balloon
7. 7.⚖️ 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
8. 8.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) detergent water (c) sugar water (d) plain water
9. 9.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
11. 11.True or false: curd is an acid. (a) False (b) True
12. 12.🫧 Which of these is a base? (a) curd (b) detergent water (c) tamarind water (d) orange juice
13. 13.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
14. 14.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it stays yellow (c) it turns black (d) it turns red
15. 15.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
16. 16.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
17. 17.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
18. 18.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) curd (d) detergent water
19. 19.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
20. 20.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a magnet (c) a comb (d) yeast
21. 21.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a dropper or spoon (c) yeast (d) a battery cell
25. 25.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) bright blue (d) green
26. 26.True or false: salt water is an acid. (a) True (b) False
27. 27.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
28. 28.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
29. 29.🫧 Which of these is neutral? (a) tamarind water (b) orange juice (c) sugar water (d) curd
30. 30.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) tamarind water
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the turmeric paper (d) the colour we see
33. 33.True or false: lemon juice is an acid. (a) True (b) False
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the number of drops (c) the colour we see
35. 35.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
36. 36.⚖️ 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 colour we see (c) the light we look in (d) the turmeric paper
37. 37.⚖️ 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
38. 38.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) plain water (c) lemon juice (d) vinegar
39. 39.🔍 Which is the odd one out? (a) plain water (b) tamarind water (c) sugar water (d) detergent water
40. 40.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow

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