Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 347 · 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.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
2. 2.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
3. 3.🫧 Which of these is neutral? (a) detergent water (b) vinegar (c) baking soda water (d) salt water
4. 4.True or false: plain water is an acid. (a) False (b) True
5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) white paper strips (c) soap solution (d) water
6. 6.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
7. 7.⚖️ 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 measure it (c) we change it
8. 8.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
9. 9.🫧 Which of these is neutral? (a) plain water (b) soap solution (c) curd (d) lemon juice
10. 10.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the liquid we test
14. 14.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
15. 15.True or false: yeast is needed for the turmeric test. (a) False (b) True
16. 16.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) white paper strips (c) a balloon (d) turmeric powder
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it turns blue (d) it disappears
21. 21.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) a battery cell (d) white paper strips
23. 23.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
24. 24.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns blue (d) it turns green
25. 25.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
26. 26.🫧 Which of these is an acid? (a) curd (b) baking soda water (c) salt water (d) sugar water
27. 27.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
28. 28.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a battery cell (c) water (d) lemon juice
29. 29.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) detergent water (c) baking soda water (d) soap solution
30. 30.🟡 Which of these keeps turmeric yellow? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
31. 31.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
32. 32.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
34. 34.True or false: soap solution keeps turmeric yellow. (a) True (b) False
35. 35.True or false: sugar water is neutral. (a) True (b) False
36. 36.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) turmeric powder (c) a magnet (d) a battery cell
37. 37.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
38. 38.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
39. 39.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
40. 40.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) a white party dress (d) your school uniform

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