Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 378 · 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: tamarind water is a base. (a) False (b) True
2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) turmeric powder (d) a comb
3. 3.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
4. 4.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) soap solution (d) plain water
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the light we look in (d) the liquid we test
8. 8.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) soap solution (d) detergent water
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
10. 10.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) turmeric powder (c) a mirror (d) a balloon
11. 11.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a mirror (c) a magnet (d) lemon juice
12. 12.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) lemon juice (d) detergent water
13. 13.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
14. 14.🫧 Which of these is a base? (a) curd (b) salt water (c) sugar water (d) detergent water
15. 15.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) vinegar (c) soap solution (d) lemon juice
16. 16.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) a dropper or spoon (d) a magnet
17. 17.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
18. 18.🫧 Which of these is an acid? (a) plain water (b) detergent water (c) tamarind water (d) soap solution
19. 19.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) soap solution (d) a magnet
20. 20.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
21. 21.True or false: tamarind water is neutral. (a) False (b) True
22. 22.🟡 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
23. 23.True or false: a comb is needed for the turmeric test. (a) False (b) True
24. 24.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) lemon juice (d) baking soda water
25. 25.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) bright blue (d) green
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the liquid we test (c) the turmeric paper (d) the colour we see
28. 28.True or false: yeast is needed for the turmeric test. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) sugar water (d) tamarind water
30. 30.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) lemon juice (c) detergent water (d) plain water
31. 31.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns blue (c) it disappears (d) it turns darker red
32. 32.True or false: curd is a base. (a) True (b) False
33. 33.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
34. 34.True or false: soap solution is needed for the turmeric test. (a) False (b) True
35. 35.True or false: a mirror is needed for the turmeric test. (a) True (b) False
36. 36.True or false: yeast is not needed for the turmeric test. (a) False (b) True
37. 37.True or false: a magnet is needed for the turmeric test. (a) False (b) True
38. 38.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
39. 39.True or false: orange juice is an acid. (a) False (b) True
40. 40.🫧 Which of these is an acid? (a) soap solution (b) detergent water (c) orange juice (d) sugar water

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