Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 118 · 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.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a mirror (c) a dropper or spoon (d) white paper strips
3. 3.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) a white party dress (d) your school uniform
4. 4.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) detergent water (d) lemon juice
5. 5.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap water is a base (d) soap is hot
6. 6.True or false: vinegar is neutral. (a) False (b) True
7. 7.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
8. 8.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) sugar water
9. 9.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) soap solution (c) baking soda water (d) detergent water
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) a battery cell (d) a dropper or spoon
11. 11.🫧 Which of these is an acid? (a) baking soda water (b) orange juice (c) detergent water (d) soap solution
12. 12.🧺 Which of these is not needed for the turmeric test? (a) water (b) lemon juice (c) a mirror (d) a dropper or spoon
13. 13.🧺 Which of these is needed for the turmeric test? (a) yeast (b) lemon juice (c) a mirror (d) a magnet
14. 14.🫧 Which of these is neutral? (a) salt water (b) baking soda water (c) tamarind water (d) soap solution
15. 15.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a magnet (c) a dropper or spoon (d) lemon juice
17. 17.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
18. 18.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) soap solution (d) vinegar
19. 19.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) vinegar (c) sugar water (d) soap solution
20. 20.True or false: tamarind water is an acid. (a) False (b) True
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.True or false: orange juice is a base. (a) False (b) True
23. 23.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the number of drops (c) the colour we see
25. 25.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a pulley (d) a magnet
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
27. 27.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
28. 28.True or false: detergent water is neutral. (a) True (b) False
29. 29.True or false: tamarind water is neutral. (a) False (b) True
30. 30.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) turmeric powder (d) a battery cell
31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) white paper strips (d) yeast
32. 32.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it disappears (d) it turns yellow again
33. 33.🫧 Which of these is a base? (a) soap solution (b) vinegar (c) lemon juice (d) sugar water
34. 34.🔮 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
35. 35.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) baking soda water (d) detergent water
36. 36.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
37. 37.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
38. 38.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
39. 39.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) lemon juice (c) baking soda water (d) detergent water
40. 40.🫧 Which of these is an acid? (a) plain water (b) tamarind water (c) soap solution (d) salt water

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