Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 369 · 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.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap water is a base (d) soap is hot
2. 2.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
3. 3.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) it turns green (d) reddish-brown
4. 4.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
5. 5.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) lemon juice (c) a dropper or spoon (d) water
7. 7.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
8. 8.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
9. 9.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) water (d) a mirror
10. 10.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
11. 11.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) lemon juice (d) detergent water
12. 12.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
13. 13.⚖️ 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
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
15. 15.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
16. 16.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) vinegar (d) soap solution
17. 17.⚖️ 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
18. 18.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) detergent water (d) baking soda water
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
20. 20.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
23. 23.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) plain water (d) vinegar
24. 24.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
25. 25.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
26. 26.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
27. 27.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
28. 28.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) bright blue (c) reddish-brown (d) green
29. 29.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
30. 30.🫧 Which of these is a base? (a) tamarind water (b) soap solution (c) lemon juice (d) sugar water
31. 31.True or false: a balloon is needed for the turmeric test. (a) True (b) False
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the number of drops (c) the light we look in (d) the liquid we test
33. 33.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a magnet (c) white paper strips (d) soap solution
34. 34.⚖️ 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 liquid we test (d) the light we look in
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
36. 36.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
37. 37.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
38. 38.True or false: a comb is needed for the turmeric test. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) detergent water (d) vinegar
40. 40.True or false: white paper strips is needed for the turmeric test. (a) True (b) False

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