Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 112 · 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 salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
2. 2.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) lemon juice (c) salt water (d) soap solution
3. 3.🧺 Which of these is needed for the turmeric test? (a) yeast (b) soap solution (c) a balloon (d) a magnet
4. 4.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) plain water (c) tamarind water (d) salt water
5. 5.🔍 Which is the odd one out? (a) baking soda water (b) sugar water (c) detergent water (d) soap solution
6. 6.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
7. 7.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
8. 8.True or false: a balloon is needed for the turmeric test. (a) False (b) True
9. 9.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) lemon juice (c) vinegar (d) tamarind water
12. 12.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
13. 13.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
15. 15.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a battery cell (c) lemon juice (d) a balloon
16. 16.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a battery cell (c) lemon juice (d) a dropper or spoon
18. 18.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
19. 19.🍋 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
20. 20.True or false: soap solution keeps turmeric yellow. (a) False (b) True
21. 21.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
22. 22.True or false: soap solution is needed for the turmeric test. (a) False (b) True
23. 23.🟡 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
24. 24.True or false: yeast is needed for the turmeric test. (a) False (b) True
25. 25.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) yeast (d) turmeric powder
26. 26.🫧 Which of these is a base? (a) curd (b) plain water (c) vinegar (d) detergent water
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a mirror (c) white paper strips (d) lemon juice
28. 28.🔍 Which is the odd one out? (a) plain water (b) sugar water (c) detergent water (d) tamarind water
29. 29.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it disappears (d) it turns blue
30. 30.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) plain water (d) salt water
31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
32. 32.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
33. 33.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
34. 34.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
35. 35.True or false: sugar water keeps turmeric yellow. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) tamarind water (b) vinegar (c) sugar water (d) baking soda water
37. 37.🫧 Which of these is an acid? (a) salt water (b) lemon juice (c) sugar water (d) baking soda water
38. 38.⚖️ 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 light we look in (c) the colour we see (d) the liquid we test
39. 39.True or false: a magnet is needed for the turmeric test. (a) False (b) True
40. 40.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed

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