Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 745 · 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 tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
2. 2.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
3. 3.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
4. 4.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is hot (d) soap is magnetic
5. 5.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the colour we see (c) the liquid we test
7. 7.True or false: yeast is not needed for the turmeric test. (a) True (b) False
8. 8.🫧 Which of these is neutral? (a) soap solution (b) lemon juice (c) plain water (d) vinegar
9. 9.🫧 Which of these is a base? (a) vinegar (b) curd (c) detergent water (d) salt water
10. 10.🫧 Which of these is an acid? (a) salt water (b) orange juice (c) soap solution (d) detergent water
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
12. 12.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) sip each liquid (d) use only kitchen items
13. 13.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
14. 14.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) bright blue (c) green (d) reddish-brown
15. 15.🫧 Which of these is neutral? (a) lemon juice (b) salt water (c) soap solution (d) curd
16. 16.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
17. 17.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a mirror (d) a dropper or spoon
19. 19.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
20. 20.🫧 Which of these is an acid? (a) detergent water (b) salt water (c) lemon juice (d) plain water
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a battery cell (c) soap solution (d) a dropper or spoon
23. 23.⚖️ 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
24. 24.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) salt water (c) baking soda water (d) tamarind water
26. 26.True or false: yeast is needed for the turmeric test. (a) False (b) True
27. 27.🫧 Which of these is an acid? (a) detergent water (b) curd (c) baking soda water (d) soap solution
28. 28.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the light we look in
30. 30.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
31. 31.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a mirror (c) a dropper or spoon (d) yeast
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
33. 33.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
34. 34.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) soap solution (c) turmeric powder (d) water
37. 37.True or false: tamarind water is an acid. (a) False (b) True
38. 38.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
39. 39.⚖️ 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
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) a dropper or spoon (c) soap solution (d) turmeric powder

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