Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 64 · 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.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) vinegar (c) plain water (d) salt water
2. 2.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) lemon juice (c) plain water (d) sugar water
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) white at once (d) green
5. 5.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
6. 6.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) turmeric powder (d) a balloon
8. 8.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
9. 9.🫧 Which of these is a base? (a) vinegar (b) plain water (c) lemon juice (d) baking soda water
10. 10.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) water (c) white paper strips (d) lemon juice
12. 12.True or false: yeast is not needed for the turmeric test. (a) True (b) False
13. 13.🟡 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
14. 14.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
15. 15.True or false: a magnet is needed for the turmeric test. (a) True (b) False
16. 16.⚖️ 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
17. 17.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
18. 18.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) plain water (d) orange juice
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
21. 21.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) a magnet (d) white paper strips
22. 22.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) vinegar
23. 23.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) soap solution (d) detergent water
24. 24.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
25. 25.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) soap solution (d) sugar water
26. 26.🔍 Which is the odd one out? (a) detergent water (b) vinegar (c) soap solution (d) baking soda water
27. 27.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a dropper or spoon (c) a mirror (d) yeast
28. 28.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a mirror (c) lemon juice (d) turmeric powder
30. 30.🫧 Which of these is an acid? (a) detergent water (b) baking soda water (c) soap solution (d) vinegar
31. 31.🫧 Which of these is an acid? (a) plain water (b) lemon juice (c) baking soda water (d) sugar water
32. 32.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
33. 33.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
34. 34.⚖️ 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
35. 35.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a magnet (d) a prism
36. 36.True or false: curd is an acid. (a) False (b) True
37. 37.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
38. 38.⚖️ 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
39. 39.True or false: tamarind water is an acid. (a) True (b) False
40. 40.True or false: water is not needed for the turmeric test. (a) False (b) True

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