Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 320 · 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.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
2. 2.🫧 Which of these is a base? (a) tamarind water (b) detergent water (c) lemon juice (d) vinegar
3. 3.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) yeast (d) soap solution
4. 4.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
5. 5.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
6. 6.True or false: curd is neutral. (a) True (b) False
7. 7.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
8. 8.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
9. 9.🧺 Which of these is not needed for the turmeric test? (a) water (b) a magnet (c) turmeric powder (d) white paper strips
10. 10.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) reddish (d) bright blue
11. 11.⚖️ 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 measure it (c) we change it
12. 12.True or false: tamarind water is neutral. (a) True (b) False
13. 13.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) a pulley (d) an indicator
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the number of drops (c) the liquid we test (d) the colour we see
15. 15.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) baking soda water (c) soap solution (d) detergent water
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the number of drops (d) the turmeric paper
17. 17.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.🫧 Which of these is an acid? (a) plain water (b) sugar water (c) baking soda water (d) orange juice
20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) water (d) a magnet
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) a battery cell (d) a dropper or spoon
22. 22.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) vinegar (c) baking soda water (d) detergent water
23. 23.True or false: yeast is not needed for the turmeric test. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) lemon juice
25. 25.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
26. 26.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
27. 27.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a magnet (c) a battery cell (d) yeast
28. 28.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
29. 29.🫧 Which of these is an acid? (a) baking soda water (b) detergent water (c) vinegar (d) plain water
30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) yeast (c) soap solution (d) turmeric powder
31. 31.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) use only kitchen items (d) mix bathroom cleaners
32. 32.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) turmeric powder (d) a balloon
34. 34.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is magnetic (d) soap is hot
35. 35.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
36. 36.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns blue (c) it stays yellow (d) it turns red
39. 39.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) tamarind water (d) soap solution
40. 40.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns black (d) it turns red

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