Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 61 · 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: lemon juice is a base. (a) False (b) True
2. 2.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the number of drops (c) the turmeric paper (d) the colour we see
4. 4.⚖️ 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
5. 5.⚖️ 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 liquid we test (c) the turmeric paper (d) the colour we see
6. 6.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a dropper or spoon (c) a magnet (d) a battery cell
7. 7.🫧 Which of these is a base? (a) orange juice (b) plain water (c) tamarind water (d) soap solution
8. 8.True or false: yeast is needed for the turmeric test. (a) True (b) False
9. 9.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a dropper or spoon (c) a battery cell (d) soap solution
10. 10.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
11. 11.True or false: vinegar keeps turmeric yellow. (a) False (b) True
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a battery cell (c) soap solution (d) water
13. 13.⚖️ 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
14. 14.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
15. 15.🔍 Which is the odd one out? (a) lemon juice (b) sugar water (c) soap solution (d) plain water
16. 16.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) yeast (c) a balloon (d) a magnet
17. 17.🫧 Which of these is a base? (a) vinegar (b) lemon juice (c) baking soda water (d) curd
18. 18.🔍 Which is the odd one out? (a) plain water (b) tamarind water (c) detergent water (d) lemon juice
19. 19.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) salt water (d) detergent water
20. 20.True or false: baking soda water is an acid. (a) True (b) False
21. 21.True or false: sugar water is a base. (a) False (b) True
22. 22.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
23. 23.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
24. 24.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) plain water (c) soap solution (d) tamarind water
26. 26.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) vinegar
27. 27.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
28. 28.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) salt water (d) detergent water
29. 29.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) a mirror (d) water
31. 31.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns black (d) it turns blue
32. 32.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) water (c) yeast (d) a comb
33. 33.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) green (d) white at once
34. 34.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
37. 37.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
38. 38.True or false: soap solution keeps turmeric yellow. (a) False (b) True
39. 39.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it turns yellow again (d) it disappears
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same

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