Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 510 · 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: turmeric powder is not needed for the turmeric test. (a) False (b) True
2. 2.True or false: vinegar is a base. (a) True (b) False
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
5. 5.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns darker red (d) it turns blue
6. 6.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) vinegar (d) baking soda water
7. 7.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
8. 8.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) turmeric powder (c) white paper strips (d) yeast
9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) yeast (c) water (d) a dropper or spoon
10. 10.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns green (d) it turns blue
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the light we look in (c) the colour we see (d) the turmeric paper
12. 12.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
13. 13.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) soap solution (c) turmeric powder (d) a battery cell
16. 16.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
17. 17.🫧 Which of these is a base? (a) curd (b) lemon juice (c) plain water (d) soap solution
18. 18.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a mirror (c) a dropper or spoon (d) a magnet
19. 19.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) soap solution (d) a balloon
22. 22.True or false: orange juice is a base. (a) False (b) True
23. 23.🫧 Which of these is neutral? (a) tamarind water (b) detergent water (c) plain water (d) lemon juice
24. 24.True or false: salt water keeps turmeric yellow. (a) True (b) False
25. 25.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
26. 26.True or false: baking soda water is an acid. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) sugar water (b) salt water (c) plain water (d) soap solution
28. 28.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) lemon juice (c) sugar water (d) vinegar
29. 29.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) a dropper or spoon (c) water (d) turmeric powder
30. 30.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) salt water (d) detergent water
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
32. 32.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
33. 33.⚖️ 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 change it (c) we measure it
34. 34.⚖️ 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
35. 35.⚖️ 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 colour we see (c) the light we look in (d) the liquid we test
36. 36.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
37. 37.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
38. 38.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
39. 39.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) salt water (c) soap solution (d) tamarind water
40. 40.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) detergent water (c) tamarind water (d) plain water

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