Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 716 · 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: vinegar is an acid. (a) False (b) True
2. 2.🫧 Which of these is a base? (a) baking soda water (b) lemon juice (c) salt water (d) orange juice
3. 3.🔮 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
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🟡 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
6. 6.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
7. 7.⚖️ 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 turmeric paper (c) the liquid we test (d) the light we look in
8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) a mirror (d) white paper strips
9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) lemon juice (d) yeast
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
11. 11.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) plain water (c) sugar water (d) detergent water
12. 12.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a battery cell (c) a magnet (d) yeast
13. 13.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a magnet (c) water (d) a mirror
14. 14.⚖️ 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
15. 15.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard
16. 16.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a mirror (d) yeast
17. 17.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
18. 18.🧺 Which of these is needed for the turmeric test? (a) a comb (b) yeast (c) turmeric powder (d) a mirror
19. 19.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) soap solution (c) plain water (d) lemon juice
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
22. 22.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) lemon juice (c) baking soda water (d) detergent water
23. 23.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
24. 24.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
25. 25.🫧 Which of these is an acid? (a) sugar water (b) detergent water (c) orange juice (d) plain water
26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a dropper or spoon (d) a balloon
27. 27.🫧 Which of these is an acid? (a) plain water (b) curd (c) detergent water (d) salt water
28. 28.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
29. 29.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
30. 30.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
31. 31.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) sugar water (c) soap solution (d) baking soda water
32. 32.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
34. 34.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) tamarind water (b) lemon juice (c) plain water (d) baking soda water
36. 36.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
37. 37.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) baking soda water (d) soap solution
38. 38.🫧 Which of these is an acid? (a) sugar water (b) detergent water (c) salt water (d) tamarind water
39. 39.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
40. 40.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow

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