Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 920 · 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: orange juice is an acid. (a) False (b) True
2. 2.True or false: plain water is neutral. (a) False (b) True
3. 3.⚖️ 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
4. 4.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
5. 5.🫧 Which of these is neutral? (a) sugar water (b) curd (c) vinegar (d) orange juice
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) white paper strips (c) water (d) turmeric powder
7. 7.True or false: a balloon is needed for the turmeric test. (a) True (b) False
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the liquid we test (c) the number of drops (d) the colour we see
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the turmeric paper (c) the liquid we test (d) the colour we see
10. 10.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
11. 11.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) detergent water (d) baking soda water
12. 12.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) tamarind water (c) salt water (d) lemon juice
13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) white paper strips (c) a dropper or spoon (d) lemon juice
14. 14.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) turmeric powder (c) water (d) a magnet
15. 15.🫧 Which of these is neutral? (a) soap solution (b) tamarind water (c) plain water (d) orange juice
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
18. 18.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) yeast (c) a magnet (d) a mirror
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) a dropper or spoon (c) turmeric powder (d) lemon juice
20. 20.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
21. 21.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
22. 22.True or false: water is needed for the turmeric test. (a) False (b) True
23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) a magnet (d) a dropper or spoon
24. 24.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
25. 25.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
26. 26.⚖️ 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
27. 27.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns darker red (d) it turns yellow again
28. 28.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
29. 29.⚖️ 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 turmeric paper
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
31. 31.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) water (c) a comb (d) a battery cell
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
33. 33.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
34. 34.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
35. 35.⚖️ 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
36. 36.True or false: lemon juice is an acid. (a) True (b) False
37. 37.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) vinegar (c) detergent water (d) soap solution
38. 38.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) lemon juice (c) a comb (d) water
39. 39.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) baking soda water (d) soap solution
40. 40.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish

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