Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 840 · 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.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
2. 2.🫧 Which of these is an acid? (a) lemon juice (b) detergent water (c) baking soda water (d) salt water
3. 3.🫧 Which of these is an acid? (a) detergent water (b) plain water (c) soap solution (d) vinegar
4. 4.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
5. 5.⚖️ 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
6. 6.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your school uniform (d) your best clothes
7. 7.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
8. 8.⚖️ 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 light we look in
9. 9.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
10. 10.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
11. 11.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a mirror (c) a magnet (d) a comb
12. 12.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
13. 13.True or false: detergent water keeps turmeric yellow. (a) False (b) True
14. 14.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
15. 15.True or false: vinegar keeps turmeric yellow. (a) True (b) False
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the number of drops (d) the liquid we test
17. 17.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) lemon juice (c) baking soda water (d) tamarind water
18. 18.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
19. 19.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) a dropper or spoon (c) white paper strips (d) water
20. 20.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) it turns blue (d) reddish-brown
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) white paper strips (d) a balloon
22. 22.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) reddish (d) white at once
23. 23.⚖️ 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
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) detergent water (d) tamarind water
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) salt water (d) tamarind water
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
29. 29.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) sip each liquid (d) mix bathroom cleaners
30. 30.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
31. 31.🫧 Which of these is an acid? (a) curd (b) soap solution (c) sugar water (d) plain water
32. 32.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
33. 33.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
34. 34.🫧 Which of these is neutral? (a) curd (b) salt water (c) lemon juice (d) vinegar
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) water (d) a mirror
36. 36.True or false: a battery cell is not 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) a magnet (c) water (d) soap solution
38. 38.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) lemon juice (d) a comb
39. 39.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
40. 40.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True

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