Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 297 · 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 blue (b) it turns red (c) it stays yellow (d) it turns black
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the number of drops (d) the light we look in
3. 3.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
4. 4.🫧 Which of these is an acid? (a) sugar water (b) tamarind water (c) detergent water (d) baking soda water
5. 5.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
6. 6.🔍 Which is the odd one out? (a) detergent water (b) sugar water (c) plain water (d) salt water
7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) lemon juice (c) soap solution (d) water
8. 8.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
9. 9.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) bright blue (d) green
10. 10.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) bright blue (d) it stays white
11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) turmeric powder (c) soap solution (d) lemon juice
12. 12.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
13. 13.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) salt water (c) vinegar (d) soap solution
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the number of drops (c) the liquid we test (d) the colour we see
15. 15.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
16. 16.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
17. 17.🫧 Which of these is neutral? (a) curd (b) tamarind water (c) sugar water (d) vinegar
18. 18.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) it turns green (d) reddish-brown
19. 19.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) tamarind water (c) salt water (d) detergent water
22. 22.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
23. 23.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
24. 24.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it turns blue (d) it disappears
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.🔍 Which is the odd one out? (a) baking soda water (b) salt water (c) plain water (d) sugar water
27. 27.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) salt water (d) baking soda water
28. 28.⚖️ 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
29. 29.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
31. 31.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
32. 32.True or false: soap solution is neutral. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
34. 34.🛟 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
35. 35.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
36. 36.🔍 Which is the odd one out? (a) plain water (b) soap solution (c) vinegar (d) lemon juice
37. 37.True or false: lemon juice is an acid. (a) False (b) True
38. 38.True or false: sugar water is neutral. (a) False (b) True
39. 39.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
40. 40.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral

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