Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 53 · 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.True or false: detergent water is an acid. (a) False (b) True
2. 2.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
4. 4.True or false: lemon juice is a base. (a) False (b) True
5. 5.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it stays yellow (d) it turns blue
6. 6.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns yellow again (c) it turns darker red (d) it disappears
7. 7.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
8. 8.⚖️ 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
9. 9.⚖️ 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 measure it (c) we change it
10. 10.⚖️ 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
11. 11.True or false: water is not needed for the turmeric test. (a) True (b) False
12. 12.True or false: plain water keeps turmeric yellow. (a) True (b) False
13. 13.🫧 Which of these is an acid? (a) lemon juice (b) salt water (c) sugar water (d) soap solution
14. 14.🛟 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
15. 15.True or false: baking soda water is neutral. (a) False (b) True
16. 16.True or false: tamarind water is an acid. (a) False (b) True
17. 17.⚖️ 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
18. 18.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
19. 19.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
20. 20.True or false: salt water is a base. (a) True (b) False
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a balloon (c) lemon juice (d) water
22. 22.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) your best clothes (d) an old shirt or apron
23. 23.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
24. 24.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
25. 25.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
26. 26.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) soap solution (d) sugar water
27. 27.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
28. 28.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
29. 29.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the liquid we test (c) the colour we see (d) the number of drops
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
32. 32.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) salt water (c) detergent water (d) soap solution
33. 33.🫧 Which of these is an acid? (a) baking soda water (b) detergent water (c) sugar water (d) curd
34. 34.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap is hot (d) soap water is a base
35. 35.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) soap solution (c) yeast (d) water
36. 36.True or false: sugar water is neutral. (a) False (b) True
37. 37.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
38. 38.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
39. 39.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) a mirror (d) a dropper or spoon
40. 40.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) lemon juice (d) detergent water

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