Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 909 · 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.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) vinegar (c) sugar water (d) tamarind water
2. 2.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) green (d) white at once
3. 3.True or false: water is needed for the turmeric test. (a) True (b) False
4. 4.True or false: baking soda water is a base. (a) True (b) False
5. 5.⚖️ 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
6. 6.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) yeast (c) water (d) turmeric powder
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the light we look in
8. 8.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
9. 9.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
10. 10.🛟 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
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
12. 12.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
13. 13.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it turns yellow again (d) it disappears
14. 14.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) lemon juice (d) soap solution
15. 15.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
16. 16.🫧 Which of these is an acid? (a) lemon juice (b) baking soda water (c) sugar water (d) detergent water
17. 17.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) plain water
18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) turmeric powder (c) lemon juice (d) a dropper or spoon
19. 19.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
20. 20.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
21. 21.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
22. 22.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
23. 23.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) salt water (c) lemon juice (d) soap solution
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
25. 25.⚖️ 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 number of drops (d) the colour we see
26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a balloon (c) a dropper or spoon (d) white paper strips
27. 27.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
28. 28.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
29. 29.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the colour we see (c) the liquid we test
31. 31.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) a dropper or spoon (d) a magnet
32. 32.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) white paper strips (c) turmeric powder (d) water
33. 33.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
34. 34.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
35. 35.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
36. 36.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is magnetic (d) soap is an acid
37. 37.⚖️ 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
38. 38.True or false: lemon juice is an acid. (a) False (b) True
39. 39.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
40. 40.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed

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