Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 423 · 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) tamarind water (b) lemon juice (c) plain water (d) baking soda water
2. 2.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
3. 3.🫧 Which of these is an acid? (a) orange juice (b) detergent water (c) soap solution (d) baking soda water
4. 4.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
5. 5.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) salt water (d) curd
6. 6.🫧 Which of these is an acid? (a) salt water (b) soap solution (c) tamarind water (d) detergent water
7. 7.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the turmeric paper (c) the number of drops (d) the colour we see
9. 9.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) salt water (c) lemon juice (d) vinegar
10. 10.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) white paper strips (c) soap solution (d) turmeric powder
13. 13.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) vinegar
14. 14.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
15. 15.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) a battery cell (d) soap solution
17. 17.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) baking soda water (d) soap solution
18. 18.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
19. 19.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
20. 20.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) white paper strips (c) yeast (d) a magnet
21. 21.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) bright blue (d) white at once
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
23. 23.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
25. 25.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is an acid (c) soap is magnetic (d) soap water is a base
26. 26.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a mirror (c) white paper strips (d) lemon juice
30. 30.True or false: soap solution is needed for the turmeric test. (a) False (b) True
31. 31.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
32. 32.⚖️ 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
33. 33.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) an indicator (c) a prism (d) a magnet
34. 34.⚖️ 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
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) white paper strips (c) water (d) soap solution
36. 36.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
37. 37.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) water (c) a comb (d) a balloon
38. 38.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) a white party dress (d) your best clothes
39. 39.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
40. 40.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) yeast (c) a battery cell (d) lemon juice

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