Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 556 · 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 salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
2. 2.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
3. 3.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) salt water
4. 4.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) plain water (b) soap solution (c) lemon juice (d) vinegar
7. 7.True or false: plain water is a base. (a) True (b) False
8. 8.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) white paper strips (d) yeast
9. 9.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
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 number of drops (c) the light we look in (d) the colour we see
11. 11.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the turmeric paper (c) the light we look in (d) the liquid we test
13. 13.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) a comb (d) water
14. 14.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) lemon juice (c) detergent water (d) vinegar
15. 15.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
16. 16.🫧 Which of these is neutral? (a) detergent water (b) baking soda water (c) lemon juice (d) plain water
17. 17.🫧 Which of these is a base? (a) salt water (b) vinegar (c) sugar water (d) soap solution
18. 18.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
19. 19.True or false: vinegar keeps turmeric yellow. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
21. 21.True or false: curd is an acid. (a) False (b) True
22. 22.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
23. 23.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) water (c) a dropper or spoon (d) turmeric powder
25. 25.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
26. 26.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
27. 27.True or false: a magnet is needed for the turmeric test. (a) False (b) True
28. 28.⚖️ 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 turmeric paper
29. 29.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) reddish (d) white at once
30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) white paper strips (c) water (d) soap solution
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.🧺 Which of these is not needed for the turmeric test? (a) water (b) lemon juice (c) a battery cell (d) soap solution
33. 33.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) soap solution (d) salt water
34. 34.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) baking soda water (d) detergent water
35. 35.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
36. 36.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
37. 37.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
38. 38.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) a mirror (d) turmeric powder
40. 40.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow

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