Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 362 · 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 hot (b) soap is an acid (c) soap is magnetic (d) soap water is a base
2. 2.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
3. 3.🫧 Which of these is neutral? (a) lemon juice (b) salt water (c) tamarind water (d) vinegar
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the number of drops
5. 5.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
6. 6.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
7. 7.🔮 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
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
9. 9.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
10. 10.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
11. 11.🧺 Which of these is not needed for the turmeric test? (a) yeast (b) lemon juice (c) turmeric powder (d) soap solution
12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
13. 13.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.True or false: detergent water is a base. (a) True (b) False
16. 16.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a battery cell (c) a balloon (d) white paper strips
17. 17.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
18. 18.True or false: sugar water keeps turmeric yellow. (a) True (b) False
19. 19.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
20. 20.True or false: soap solution keeps turmeric yellow. (a) True (b) False
21. 21.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) a dropper or spoon (c) turmeric powder (d) water
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🍋 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
25. 25.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
26. 26.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) green (d) reddish-brown
27. 27.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) water (c) white paper strips (d) turmeric powder
29. 29.🔍 Which is the odd one out? (a) tamarind water (b) lemon juice (c) vinegar (d) baking soda water
30. 30.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) use only kitchen items (d) sniff each bottle hard
31. 31.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
32. 32.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
33. 33.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) white paper strips (c) soap solution (d) a battery cell
34. 34.True or false: salt water is a base. (a) True (b) False
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) a magnet (d) water
36. 36.⚖️ 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
37. 37.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns red (d) it turns black
38. 38.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
39. 39.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
40. 40.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid

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