Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 581 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) white paper strips (d) a balloon
3. 3.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
4. 4.🫧 Which of these is a base? (a) tamarind water (b) lemon juice (c) baking soda water (d) plain water
5. 5.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
6. 6.🫧 Which of these is a base? (a) tamarind water (b) soap solution (c) salt water (d) lemon juice
7. 7.⚖️ 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
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
9. 9.True or false: lemon juice is an acid. (a) False (b) True
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) soap solution (d) a magnet
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the number of drops (d) the colour we see
12. 12.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
13. 13.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
15. 15.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
16. 16.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a battery cell (c) lemon juice (d) turmeric powder
18. 18.True or false: a comb is needed for the turmeric test. (a) False (b) True
19. 19.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) turmeric powder (c) water (d) a comb
20. 20.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) soap solution (c) tamarind water (d) lemon juice
21. 21.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a magnet (c) a dropper or spoon (d) yeast
22. 22.True or false: a balloon is needed for the turmeric test. (a) True (b) False
23. 23.🫧 Which of these is neutral? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
24. 24.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
25. 25.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) salt water (d) baking soda water
26. 26.⚖️ 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 liquid we test (c) the number of drops (d) the turmeric paper
27. 27.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
28. 28.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) an indicator (c) a magnet (d) a pulley
29. 29.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
30. 30.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) a balloon (d) water
31. 31.⚖️ 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 change it (c) we keep it the same
32. 32.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) lemon juice (c) plain water (d) sugar water
33. 33.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a mirror (c) water (d) a magnet
34. 34.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) tamarind water (c) detergent water (d) soap solution
35. 35.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
36. 36.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) lemon juice (c) soap solution (d) white paper strips
37. 37.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
38. 38.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
39. 39.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
40. 40.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) detergent water (d) tamarind water

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