Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 924 · 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? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) a comb (d) turmeric powder
3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) soap solution (c) white paper strips (d) turmeric powder
4. 4.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) green (d) bright blue
5. 5.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
6. 6.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
7. 7.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
8. 8.⚖️ 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 light we look in (c) the liquid we test (d) the turmeric paper
9. 9.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) soap solution (c) turmeric powder (d) lemon juice
10. 10.🫧 Which of these is a base? (a) tamarind water (b) plain water (c) vinegar (d) detergent water
11. 11.True or false: plain water is neutral. (a) False (b) True
12. 12.True or false: sugar water is a base. (a) False (b) True
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the turmeric paper (d) the liquid we test
14. 14.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap water is a base (d) soap is hot
15. 15.🧺 Which of these is needed for the turmeric test? (a) water (b) a mirror (c) a magnet (d) a balloon
16. 16.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
17. 17.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
18. 18.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) turmeric powder (d) a battery cell
20. 20.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) tamarind water (c) baking soda water (d) detergent water
21. 21.🔍 Which is the odd one out? (a) tamarind water (b) sugar water (c) lemon juice (d) soap solution
22. 22.🛟 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
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
24. 24.🫧 Which of these is neutral? (a) curd (b) baking soda water (c) vinegar (d) sugar water
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the light we look in
26. 26.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) salt water
27. 27.True or false: sugar water keeps turmeric yellow. (a) True (b) False
28. 28.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
29. 29.🫧 Which of these is neutral? (a) orange juice (b) detergent water (c) plain water (d) soap solution
30. 30.⚖️ 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 change it (c) we keep it the same
31. 31.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
34. 34.True or false: yeast is needed for the turmeric test. (a) False (b) True
35. 35.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) tamarind water (c) sugar water (d) baking soda water
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
37. 37.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) plain water (d) vinegar
38. 38.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
39. 39.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
40. 40.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black

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