Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 671 · 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 green (b) it stays yellow (c) it turns blue (d) reddish-brown
2. 2.🫧 Which of these is neutral? (a) curd (b) plain water (c) detergent water (d) lemon juice
3. 3.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap water is a base (d) soap is hot
4. 4.🔍 Which is the odd one out? (a) tamarind water (b) soap solution (c) vinegar (d) plain water
5. 5.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) turmeric powder (c) a magnet (d) a comb
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) yeast (d) turmeric powder
7. 7.🫧 Which of these is a base? (a) detergent water (b) lemon juice (c) salt water (d) vinegar
8. 8.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) detergent water (b) vinegar (c) baking soda water (d) soap solution
10. 10.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
11. 11.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
12. 12.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
13. 13.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
14. 14.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) sugar water (b) baking soda water (c) detergent water (d) soap solution
16. 16.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) salt water (d) soap solution
17. 17.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) baking soda water (c) sugar water (d) tamarind water
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the colour we see (d) the number of drops
20. 20.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
21. 21.True or false: a mirror is needed for the turmeric test. (a) False (b) True
22. 22.⚖️ 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
23. 23.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
24. 24.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
25. 25.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) it stays white (d) bright blue
26. 26.True or false: yeast is not needed for the turmeric test. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) detergent water (d) lemon juice
28. 28.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) soap solution (c) detergent water (d) baking soda water
29. 29.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
30. 30.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
31. 31.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) plain water (d) soap solution
32. 32.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) detergent water (c) baking soda water (d) soap solution
33. 33.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) a mirror (d) a dropper or spoon
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the light we look in
35. 35.⚖️ 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
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the turmeric paper
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.True or false: soap solution keeps turmeric yellow. (a) False (b) True
39. 39.True or false: water is needed for the turmeric test. (a) False (b) True
40. 40.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) your best clothes (d) a white party dress

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