Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 450 · 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 keeps turmeric yellow? (a) detergent water (b) baking soda water (c) sugar water (d) soap solution
2. 2.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
3. 3.🫧 Which of these is neutral? (a) soap solution (b) lemon juice (c) curd (d) sugar water
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a dropper or spoon (d) yeast
6. 6.🧺 Which of these is not needed for the turmeric test? (a) water (b) turmeric powder (c) a comb (d) white paper strips
7. 7.🫧 Which of these is neutral? (a) plain water (b) vinegar (c) curd (d) detergent water
8. 8.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
9. 9.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
10. 10.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) soap solution (b) vinegar (c) lemon juice (d) salt water
12. 12.🧺 Which of these is needed for the turmeric test? (a) water (b) a magnet (c) a comb (d) yeast
13. 13.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is hot (d) soap is magnetic
14. 14.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
15. 15.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
16. 16.🫧 Which of these is a base? (a) detergent water (b) tamarind water (c) sugar water (d) curd
17. 17.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
18. 18.🫧 Which of these is neutral? (a) tamarind water (b) lemon juice (c) salt water (d) soap solution
19. 19.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) lemon juice (d) white paper strips
21. 21.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
22. 22.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) soap solution (c) salt water (d) sugar water
23. 23.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.True or false: orange juice is an acid. (a) True (b) False
26. 26.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) lemon juice (d) yeast
27. 27.⚖️ 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 liquid we test (d) the colour we see
28. 28.True or false: water is needed for the turmeric test. (a) True (b) False
29. 29.⚖️ 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
30. 30.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) a battery cell (d) a dropper or spoon
33. 33.⚖️ 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
34. 34.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) tamarind water
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
36. 36.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) white paper strips (c) yeast (d) turmeric powder
37. 37.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
38. 38.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
39. 39.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) green (d) bright blue
40. 40.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) soap solution (d) a balloon

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