Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 794 · 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.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
2. 2.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
3. 3.True or false: vinegar keeps turmeric yellow. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) vinegar (b) salt water (c) soap solution (d) plain water
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the colour we see (c) the liquid we test (d) the light we look in
6. 6.🔍 Which is the odd one out? (a) salt water (b) soap solution (c) detergent water (d) baking soda water
7. 7.🫧 Which of these is a base? (a) plain water (b) curd (c) baking soda water (d) orange juice
8. 8.🛟 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
9. 9.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) turmeric powder (c) a balloon (d) a mirror
10. 10.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
11. 11.🍋 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
12. 12.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) bright blue (d) it stays white
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
14. 14.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
15. 15.True or false: lemon juice is neutral. (a) True (b) False
16. 16.🟡 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
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) detergent water (c) baking soda water (d) soap solution
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) a dropper or spoon (d) a balloon
20. 20.True or false: orange juice is an acid. (a) True (b) False
21. 21.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a battery cell (c) lemon juice (d) a dropper or spoon
23. 23.True or false: yeast is needed for the turmeric test. (a) True (b) False
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
26. 26.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) yeast (c) water (d) lemon juice
28. 28.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
29. 29.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
30. 30.True or false: lemon juice is a base. (a) True (b) False
31. 31.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
32. 32.🫧 Which of these is neutral? (a) soap solution (b) baking soda water (c) detergent water (d) plain water
33. 33.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) a comb (d) water
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
35. 35.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
36. 36.True or false: soap solution keeps turmeric yellow. (a) True (b) False
37. 37.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
38. 38.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) lemon juice (c) a dropper or spoon (d) soap solution
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
40. 40.⚖️ 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

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