Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 509 · 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 salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
2. 2.🫧 Which of these is an acid? (a) plain water (b) tamarind water (c) soap solution (d) baking soda water
3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a balloon (c) a dropper or spoon (d) turmeric powder
4. 4.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
5. 5.True or false: orange juice is neutral. (a) True (b) False
6. 6.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) sniff each bottle hard (d) use only kitchen items
7. 7.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
8. 8.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a comb (c) turmeric powder (d) water
9. 9.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) baking soda water (c) soap solution (d) detergent water
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
11. 11.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
12. 12.🫧 Which of these is a base? (a) sugar water (b) vinegar (c) tamarind water (d) baking soda water
13. 13.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns blue (c) it disappears (d) it turns darker red
14. 14.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) sugar water (d) soap solution
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
17. 17.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
18. 18.True or false: plain water is neutral. (a) True (b) False
19. 19.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
20. 20.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
21. 21.True or false: detergent water keeps turmeric yellow. (a) False (b) True
22. 22.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.🫧 Which of these is neutral? (a) salt water (b) vinegar (c) tamarind water (d) orange juice
25. 25.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
26. 26.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) vinegar
29. 29.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
30. 30.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) soap solution (d) baking soda water
31. 31.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is an acid (c) soap water is a base (d) soap is magnetic
32. 32.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) vinegar
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) turmeric powder (c) a dropper or spoon (d) white paper strips
35. 35.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
36. 36.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
37. 37.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
38. 38.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
39. 39.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
40. 40.🔍 Which is the odd one out? (a) tamarind water (b) soap solution (c) salt water (d) plain water

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