Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 442 · 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.⚖️ 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
2. 2.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
3. 3.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
4. 4.🫧 Which of these is neutral? (a) salt water (b) soap solution (c) vinegar (d) lemon juice
5. 5.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
6. 6.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it turns yellow again (d) it disappears
7. 7.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
8. 8.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a battery cell (c) turmeric powder (d) a balloon
9. 9.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
10. 10.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) salt water (d) baking soda water
11. 11.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
12. 12.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) turmeric powder (c) water (d) a battery cell
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
14. 14.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) use only kitchen items (d) mix bathroom cleaners
15. 15.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) sugar water (c) detergent water (d) salt water
16. 16.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) soap solution (d) detergent water
17. 17.🫧 Which of these is a base? (a) lemon juice (b) sugar water (c) orange juice (d) detergent water
18. 18.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a balloon (c) lemon juice (d) a dropper or spoon
20. 20.🫧 Which of these is an acid? (a) salt water (b) sugar water (c) orange juice (d) baking soda water
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) turmeric powder (d) a battery cell
22. 22.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) it turns green (d) reddish-brown
26. 26.True or false: a balloon is needed for the turmeric test. (a) False (b) True
27. 27.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
28. 28.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
29. 29.⚖️ 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 number of drops
30. 30.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
31. 31.True or false: orange juice is neutral. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) sugar water (d) baking soda water
33. 33.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a mirror (d) soap solution
35. 35.🫧 Which of these is neutral? (a) vinegar (b) detergent water (c) soap solution (d) sugar water
36. 36.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) tamarind water (b) sugar water (c) lemon juice (d) detergent water
38. 38.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
39. 39.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
40. 40.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish

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