Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 754 · 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: soap solution is a base. (a) False (b) True
2. 2.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) a dropper or spoon (c) turmeric powder (d) lemon juice
4. 4.⚖️ 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
5. 5.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) tamarind water
6. 6.🫧 Which of these is neutral? (a) vinegar (b) soap solution (c) sugar water (d) baking soda water
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
8. 8.🫧 Which of these is neutral? (a) tamarind water (b) detergent water (c) curd (d) salt water
9. 9.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) plain water (c) vinegar (d) lemon juice
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) lemon juice (c) turmeric powder (d) water
11. 11.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
12. 12.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
13. 13.🫧 Which of these is a base? (a) plain water (b) lemon juice (c) baking soda water (d) orange juice
14. 14.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
15. 15.True or false: soap solution is an acid. (a) True (b) False
16. 16.🫧 Which of these is a base? (a) vinegar (b) plain water (c) sugar water (d) detergent water
17. 17.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) soap solution (c) detergent water (d) baking soda water
18. 18.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) yeast (c) soap solution (d) a comb
19. 19.⚖️ 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 number of drops (d) the liquid we test
20. 20.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) water (c) soap solution (d) yeast
22. 22.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
23. 23.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
24. 24.⚖️ 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
25. 25.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap is hot (d) soap water is a base
26. 26.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a mirror (c) turmeric powder (d) a magnet
27. 27.True or false: tamarind water is an acid. (a) False (b) True
28. 28.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) an indicator (d) a magnet
29. 29.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sniff each bottle hard (d) sip each liquid
30. 30.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
31. 31.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
32. 32.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) soap solution (c) water (d) white paper strips
34. 34.True or false: tamarind water is a base. (a) True (b) False
35. 35.True or false: a mirror is needed for the turmeric test. (a) True (b) False
36. 36.⚖️ 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
37. 37.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) vinegar (d) tamarind water
38. 38.True or false: vinegar is a base. (a) False (b) True
39. 39.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
40. 40.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False

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