Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 864 · 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 is a base? (a) curd (b) baking soda water (c) tamarind water (d) lemon juice
2. 2.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns yellow again (c) it disappears (d) it turns darker red
3. 3.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
4. 4.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
5. 5.🫧 Which of these is a base? (a) orange juice (b) curd (c) sugar water (d) soap solution
6. 6.True or false: a balloon is needed for the turmeric test. (a) True (b) False
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
8. 8.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) water (d) yeast
9. 9.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a magnet (c) a balloon (d) a battery cell
10. 10.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
11. 11.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a comb (c) a dropper or spoon (d) water
13. 13.🫧 Which of these is an acid? (a) plain water (b) tamarind water (c) soap solution (d) sugar water
14. 14.True or false: sugar water is neutral. (a) False (b) True
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
16. 16.True or false: plain water keeps turmeric yellow. (a) False (b) True
17. 17.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is magnetic (d) soap is hot
18. 18.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) lemon juice (d) vinegar
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the liquid we test (d) the colour we see
20. 20.🫧 Which of these is an acid? (a) detergent water (b) plain water (c) orange juice (d) baking soda water
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) salt water (c) plain water (d) detergent water
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) yeast (d) a dropper or spoon
28. 28.⚖️ 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
29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a magnet (d) soap solution
30. 30.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) lemon juice (c) plain water (d) vinegar
31. 31.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
32. 32.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) sugar water
34. 34.🔍 Which is the odd one out? (a) baking soda water (b) salt water (c) vinegar (d) lemon juice
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
36. 36.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
37. 37.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) soap solution (d) baking soda water
38. 38.True or false: detergent water is a base. (a) True (b) False
39. 39.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
40. 40.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False

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