Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 910 · 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) sugar water (b) plain water (c) tamarind water (d) detergent water
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the number of drops (d) the turmeric paper
3. 3.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
4. 4.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
5. 5.True or false: detergent water is a base. (a) False (b) True
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
8. 8.True or false: a magnet is needed for the turmeric test. (a) True (b) False
9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) water (c) a dropper or spoon (d) soap solution
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
12. 12.🫧 Which of these is a base? (a) salt water (b) tamarind water (c) curd (d) detergent water
13. 13.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap water is a base (d) soap is magnetic
14. 14.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a balloon (c) turmeric powder (d) white paper strips
16. 16.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) green (d) white at once
17. 17.⚖️ 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
18. 18.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your school uniform (d) your best clothes
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🫧 Which of these is an acid? (a) soap solution (b) detergent water (c) baking soda water (d) orange juice
21. 21.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
22. 22.⚖️ 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
23. 23.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
24. 24.True or false: water is not needed for the turmeric test. (a) False (b) True
25. 25.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) water (c) soap solution (d) white paper strips
26. 26.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) turmeric powder (d) yeast
27. 27.🔮 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
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
29. 29.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns blue (c) it disappears (d) it turns darker red
30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) white paper strips (c) a dropper or spoon (d) lemon juice
31. 31.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
32. 32.⚖️ 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 liquid we test (c) the colour we see (d) the light we look in
33. 33.True or false: lemon juice is neutral. (a) True (b) False
34. 34.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a mirror (c) water (d) a balloon
35. 35.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) soap solution (c) tamarind water (d) vinegar
36. 36.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a dropper or spoon (c) a balloon (d) a comb
37. 37.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) tamarind water
38. 38.🧺 Which of these is needed for the turmeric test? (a) yeast (b) lemon juice (c) a comb (d) a magnet
39. 39.True or false: salt water is neutral. (a) False (b) True
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it

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