Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 848 · 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.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) baking soda water (d) detergent water
2. 2.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) sugar water (d) detergent water
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
4. 4.🛟 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
5. 5.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) green (d) reddish-brown
6. 6.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
7. 7.🫧 Which of these is neutral? (a) orange juice (b) lemon juice (c) soap solution (d) sugar water
8. 8.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.🫧 Which of these is a base? (a) lemon juice (b) vinegar (c) baking soda water (d) sugar water
11. 11.True or false: curd is a base. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) sugar water (d) plain water
13. 13.⚖️ 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 colour we see (c) the number of drops (d) the liquid we test
14. 14.🫧 Which of these is neutral? (a) curd (b) plain water (c) lemon juice (d) tamarind water
15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) a mirror (d) turmeric powder
16. 16.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) baking soda water (d) lemon juice
17. 17.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
18. 18.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is an acid (d) soap is hot
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) lemon juice (d) baking soda water
21. 21.⚖️ 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
22. 22.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
23. 23.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns blue (d) it turns green
24. 24.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
25. 25.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a magnet (c) a pulley (d) a prism
26. 26.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
27. 27.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) lemon juice (c) baking soda water (d) soap solution
28. 28.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) sugar water (c) soap solution (d) lemon juice
29. 29.🔮 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
30. 30.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
31. 31.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) vinegar
32. 32.🫧 Which of these is an acid? (a) sugar water (b) baking soda water (c) vinegar (d) plain water
33. 33.True or false: tamarind water is an acid. (a) True (b) False
34. 34.🫧 Which of these is neutral? (a) vinegar (b) baking soda water (c) salt water (d) orange juice
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) yeast (c) a dropper or spoon (d) water
36. 36.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
37. 37.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
38. 38.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) plain water
39. 39.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
40. 40.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) your best clothes (d) a white party dress

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