Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 227 · 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.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) soap solution (d) vinegar
3. 3.🔍 Which is the odd one out? (a) sugar water (b) baking soda water (c) plain water (d) tamarind water
4. 4.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
5. 5.True or false: a balloon is needed for the turmeric test. (a) False (b) True
6. 6.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
8. 8.True or false: soap solution keeps turmeric yellow. (a) False (b) True
9. 9.⚖️ 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 colour we see (c) the liquid we test (d) the light we look in
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) soap solution (d) a dropper or spoon
11. 11.⚖️ 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 change it (c) we measure it
12. 12.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) vinegar (c) lemon juice (d) salt water
13. 13.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) water (c) a comb (d) white paper strips
14. 14.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
15. 15.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) a dropper or spoon (d) a mirror
16. 16.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a mirror (c) a balloon (d) yeast
17. 17.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap is magnetic (d) soap water is a base
18. 18.True or false: salt water is a base. (a) True (b) False
19. 19.True or false: lemon juice is a base. (a) True (b) False
20. 20.🫧 Which of these is an acid? (a) plain water (b) detergent water (c) sugar water (d) orange juice
21. 21.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
22. 22.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
24. 24.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
25. 25.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) white paper strips (c) a magnet (d) lemon juice
26. 26.True or false: baking soda water is a base. (a) False (b) True
27. 27.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
28. 28.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
29. 29.True or false: a mirror is needed for the turmeric test. (a) True (b) False
30. 30.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
31. 31.True or false: curd is an acid. (a) False (b) True
32. 32.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the number of drops (d) the colour we see
34. 34.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
36. 36.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
37. 37.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) salt water (d) detergent water
38. 38.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) lemon juice (c) white paper strips (d) soap solution
39. 39.🫧 Which of these is neutral? (a) orange juice (b) curd (c) salt water (d) lemon juice
40. 40.True or false: orange juice is an acid. (a) True (b) False

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