Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 81 · 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) white paper strips (b) a dropper or spoon (c) a balloon (d) soap solution
2. 2.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
3. 3.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) plain water (c) sugar water (d) tamarind water
4. 4.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
5. 5.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) lemon juice (d) baking soda water
6. 6.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
7. 7.⚖️ 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
8. 8.True or false: sugar water keeps turmeric yellow. (a) False (b) True
9. 9.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is hot (d) soap is an acid
10. 10.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) salt water (d) plain water
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
13. 13.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
14. 14.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) your school uniform (d) an old shirt or apron
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
16. 16.🔮 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
17. 17.🫧 Which of these is an acid? (a) lemon juice (b) salt water (c) soap solution (d) baking soda water
18. 18.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
19. 19.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
20. 20.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
21. 21.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) a mirror (d) water
23. 23.True or false: water is not needed for the turmeric test. (a) False (b) True
24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a battery cell (c) soap solution (d) water
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the turmeric paper (c) the colour we see (d) the light we look in
26. 26.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) white paper strips (c) a mirror (d) water
27. 27.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a battery cell (c) yeast (d) a dropper or spoon
28. 28.True or false: soap solution is an acid. (a) False (b) True
29. 29.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) lemon juice (d) soap solution
30. 30.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it turns blue (d) it disappears
31. 31.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
32. 32.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
34. 34.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
35. 35.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a magnet (c) a mirror (d) a battery cell
36. 36.⚖️ 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
37. 37.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
39. 39.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) soap solution (c) sugar water (d) vinegar
40. 40.True or false: soap solution is a base. (a) False (b) True

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