Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 896 · 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 turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
2. 2.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it disappears (c) it turns blue (d) it turns darker red
3. 3.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
4. 4.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
5. 5.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
6. 6.🧺 Which of these is not needed for the turmeric test? (a) yeast (b) soap solution (c) lemon juice (d) water
7. 7.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) lemon juice (c) tamarind water (d) sugar water
8. 8.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) a dropper or spoon (c) white paper strips (d) lemon juice
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🫧 Which of these is neutral? (a) detergent water (b) curd (c) salt water (d) orange juice
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) turmeric powder (c) a dropper or spoon (d) soap solution
13. 13.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) soap solution (d) a mirror
15. 15.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
16. 16.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a magnet (c) white paper strips (d) a dropper or spoon
17. 17.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) lemon juice (c) sugar water (d) salt water
18. 18.⚖️ 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
19. 19.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
20. 20.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
21. 21.🫧 Which of these is a base? (a) sugar water (b) detergent water (c) plain water (d) tamarind water
22. 22.⚖️ 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
23. 23.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish
24. 24.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a mirror (d) a comb
25. 25.⚖️ 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
26. 26.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
27. 27.⚖️ 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
28. 28.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) vinegar (c) baking soda water (d) detergent water
29. 29.True or false: tamarind water is neutral. (a) True (b) False
30. 30.🧺 Which of these is needed for the turmeric test? (a) water (b) a magnet (c) yeast (d) a battery cell
31. 31.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
32. 32.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is an acid (d) soap is hot
33. 33.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
34. 34.True or false: water is needed for the turmeric test. (a) True (b) False
35. 35.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) plain water (d) baking soda water
36. 36.True or false: a comb is needed for the turmeric test. (a) False (b) True
37. 37.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
38. 38.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) lemon juice
39. 39.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False

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