Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 560 · 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) detergent water (b) tamarind water (c) lemon juice (d) sugar water
2. 2.True or false: sugar water is neutral. (a) False (b) True
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) turmeric powder (c) lemon juice (d) a dropper or spoon
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the colour we see (d) the light we look in
6. 6.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a magnet (c) a comb (d) lemon juice
7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) yeast (c) water (d) white paper strips
8. 8.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) a dropper or spoon (d) a balloon
9. 9.🫧 Which of these is neutral? (a) baking soda water (b) vinegar (c) plain water (d) detergent water
10. 10.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
11. 11.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) plain water (d) salt water
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) a mirror (d) turmeric powder
14. 14.⚖️ 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
15. 15.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) bright blue (d) green
16. 16.True or false: a comb is not needed for the turmeric test. (a) False (b) True
17. 17.🫧 Which of these is an acid? (a) baking soda water (b) lemon juice (c) soap solution (d) plain water
18. 18.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a comb (c) lemon juice (d) water
19. 19.⚖️ 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 turmeric paper (c) the light we look in (d) the number of drops
20. 20.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) water (d) a battery cell
22. 22.⚖️ 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
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
24. 24.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
26. 26.🫧 Which of these is an acid? (a) orange juice (b) soap solution (c) sugar water (d) salt water
27. 27.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) soap solution (d) lemon juice
29. 29.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
30. 30.🫧 Which of these is neutral? (a) soap solution (b) baking soda water (c) lemon juice (d) salt water
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.True or false: curd is a base. (a) True (b) False
33. 33.🔮 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
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a magnet (c) a dropper or spoon (d) soap solution
36. 36.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
37. 37.True or false: salt water keeps turmeric yellow. (a) False (b) True
38. 38.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
39. 39.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
40. 40.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False

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