Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 306 · 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.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the turmeric paper (c) the colour we see (d) the light we look in
3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) a magnet (d) lemon juice
4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) turmeric powder (d) a mirror
5. 5.🫧 Which of these is neutral? (a) plain water (b) lemon juice (c) soap solution (d) curd
6. 6.🍋 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
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the turmeric paper (c) the light we look in (d) the liquid we test
8. 8.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
9. 9.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
10. 10.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
11. 11.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
12. 12.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) vinegar
13. 13.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) turmeric powder (d) a battery cell
14. 14.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is an acid (d) soap is hot
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) salt water
17. 17.🛟 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
18. 18.🔍 Which is the odd one out? (a) tamarind water (b) vinegar (c) lemon juice (d) baking soda water
19. 19.⚖️ 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 change it (c) we measure it
20. 20.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a mirror (c) a battery cell (d) a magnet
21. 21.True or false: sugar water is a base. (a) False (b) True
22. 22.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
23. 23.⚖️ 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
24. 24.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
25. 25.⚖️ 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
26. 26.True or false: lemon juice is an acid. (a) False (b) True
27. 27.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) salt water (d) baking soda water
28. 28.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) soap solution (c) vinegar (d) salt water
29. 29.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
30. 30.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.True or false: vinegar is an acid. (a) False (b) True
33. 33.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
34. 34.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) plain water (c) detergent water (d) soap solution
35. 35.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) soap solution (d) a battery cell
37. 37.🫧 Which of these is a base? (a) lemon juice (b) sugar water (c) baking soda water (d) plain water
38. 38.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) baking soda water (d) detergent water
39. 39.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
40. 40.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True

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