Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 90 · 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.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) vinegar (c) baking soda water (d) plain water
2. 2.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
3. 3.⚖️ 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
4. 4.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) a white party dress (d) an old shirt or apron
5. 5.🧺 Which of these is not needed for the turmeric test? (a) water (b) turmeric powder (c) yeast (d) white paper strips
6. 6.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
7. 7.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) it stays white (d) green
8. 8.🫧 Which of these is neutral? (a) lemon juice (b) baking soda water (c) vinegar (d) sugar water
9. 9.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) water (c) lemon juice (d) a dropper or spoon
11. 11.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
12. 12.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
13. 13.⚖️ 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
14. 14.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
15. 15.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
16. 16.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
18. 18.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) turmeric powder (c) a magnet (d) yeast
19. 19.True or false: a magnet is needed for the turmeric test. (a) False (b) True
20. 20.True or false: a balloon is needed for the turmeric test. (a) False (b) True
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) soap solution (c) a dropper or spoon (d) lemon juice
22. 22.⚖️ 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
23. 23.True or false: soap solution keeps turmeric yellow. (a) False (b) True
24. 24.⚖️ 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
25. 25.⚖️ 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 light we look in (d) the colour we see
26. 26.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
27. 27.True or false: water is not needed for the turmeric test. (a) False (b) True
28. 28.⚖️ 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
29. 29.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
30. 30.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) water (d) a magnet
31. 31.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
32. 32.⚖️ 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
33. 33.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
35. 35.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
36. 36.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
37. 37.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
38. 38.True or false: lemon juice is neutral. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
40. 40.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) soap solution (c) detergent water (d) baking soda water

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