Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 941 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) white paper strips (d) a mirror
2. 2.True or false: plain water is a base. (a) True (b) False
3. 3.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
4. 4.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) sugar water (b) plain water (c) vinegar (d) baking soda water
6. 6.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
9. 9.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
10. 10.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) tamarind water
11. 11.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) tamarind water (b) lemon juice (c) soap solution (d) vinegar
13. 13.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
16. 16.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) curd (d) salt water
17. 17.True or false: a balloon is needed for the turmeric test. (a) True (b) False
18. 18.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) lemon juice (d) a magnet
19. 19.🫧 Which of these is an acid? (a) plain water (b) vinegar (c) baking soda water (d) detergent water
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) a dropper or spoon (c) white paper strips (d) lemon juice
22. 22.🧺 Which of these is not needed for the turmeric test? (a) water (b) turmeric powder (c) a mirror (d) lemon juice
23. 23.🔮 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
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the light we look in (c) the turmeric paper (d) the number of drops
25. 25.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) yeast (c) water (d) a battery cell
26. 26.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap is hot (d) soap water is a base
27. 27.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
28. 28.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
29. 29.True or false: curd is an acid. (a) True (b) False
30. 30.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it stays yellow (c) it turns red (d) it turns black
31. 31.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) green (d) reddish-brown
32. 32.🫧 Which of these is neutral? (a) orange juice (b) detergent water (c) plain water (d) lemon juice
33. 33.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
37. 37.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) soap solution (c) lemon juice (d) sugar water
38. 38.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
40. 40.⚖️ 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

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