Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 79 · 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.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
3. 3.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns blue (d) it turns darker red
4. 4.🔮 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
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
6. 6.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
7. 7.🔮 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
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) bright blue (c) green (d) it stays white
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.True or false: water is needed for the turmeric test. (a) False (b) True
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the number of drops (c) the light we look in (d) the liquid we test
13. 13.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
14. 14.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) sugar water (c) lemon juice (d) vinegar
15. 15.True or false: a comb is not needed for the turmeric test. (a) False (b) True
16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) a dropper or spoon (c) turmeric powder (d) soap solution
17. 17.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
18. 18.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) soap solution (c) baking soda water (d) detergent water
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
20. 20.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
21. 21.True or false: vinegar keeps turmeric yellow. (a) True (b) False
22. 22.⚖️ 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
23. 23.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your best clothes (d) your school uniform
24. 24.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) turmeric powder (d) a balloon
25. 25.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) tamarind water (d) lemon juice
26. 26.🫧 Which of these is neutral? (a) soap solution (b) salt water (c) detergent water (d) orange juice
27. 27.🫧 Which of these is neutral? (a) detergent water (b) tamarind water (c) soap solution (d) plain water
28. 28.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) soap solution (d) a comb
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the number of drops (c) the light we look in (d) the colour we see
30. 30.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap is an acid (d) soap water is a base
31. 31.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
32. 32.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) vinegar (c) lemon juice (d) sugar water
33. 33.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
34. 34.🧺 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) soap solution
35. 35.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
36. 36.True or false: a mirror is needed for the turmeric test. (a) False (b) True
37. 37.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) a mirror (d) a dropper or spoon
38. 38.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a battery cell (c) lemon juice (d) turmeric powder

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