Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 392 · 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 curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
2. 2.⚖️ 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
3. 3.⚖️ 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
4. 4.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
5. 5.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
6. 6.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
7. 7.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
8. 8.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
9. 9.🫧 Which of these is neutral? (a) curd (b) lemon juice (c) tamarind water (d) plain water
10. 10.🛟 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
11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) a comb (d) turmeric powder
12. 12.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is magnetic (d) soap is an acid
13. 13.True or false: lemon juice is a base. (a) False (b) True
14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) turmeric powder (d) a balloon
15. 15.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) reddish-brown (d) green
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
17. 17.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) water (c) a mirror (d) a comb
18. 18.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
19. 19.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
20. 20.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the turmeric paper (c) the liquid we test (d) the number of drops
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
24. 24.🔮 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
25. 25.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
26. 26.True or false: water is not needed for the turmeric test. (a) False (b) True
27. 27.⚖️ 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
28. 28.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
29. 29.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a pulley (c) an indicator (d) a magnet
30. 30.True or false: orange juice is neutral. (a) True (b) False
31. 31.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) baking soda water (c) sugar water (d) tamarind water
32. 32.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
33. 33.True or false: plain water is neutral. (a) True (b) False
34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) water (c) a dropper or spoon (d) soap solution
35. 35.True or false: plain water keeps turmeric yellow. (a) False (b) True
36. 36.⚖️ 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
37. 37.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
38. 38.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
39. 39.🫧 Which of these is an acid? (a) sugar water (b) soap solution (c) orange juice (d) plain water
40. 40.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed

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