Turmeric Indicator Experiment Worksheet

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

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