Turmeric Indicator Experiment Worksheet

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

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