Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 894 · 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.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
2. 2.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a magnet (c) an indicator (d) a prism
3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) a mirror (d) soap solution
4. 4.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
5. 5.True or false: salt water is neutral. (a) False (b) True
6. 6.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
7. 7.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
8. 8.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
9. 9.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) reddish (d) bright blue
10. 10.⚖️ 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
11. 11.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) salt water (c) tamarind water (d) plain water
12. 12.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
13. 13.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
14. 14.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
15. 15.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a magnet (c) soap solution (d) turmeric powder
16. 16.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
17. 17.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) yeast (c) a battery cell (d) a comb
18. 18.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) soap solution (d) lemon juice
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a magnet (c) turmeric powder (d) water
20. 20.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) baking soda water (c) soap solution (d) detergent water
21. 21.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) lemon juice (d) baking soda water
22. 22.🔍 Which is the odd one out? (a) plain water (b) soap solution (c) detergent water (d) baking soda water
23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a balloon (c) white paper strips (d) turmeric powder
24. 24.⚖️ 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
25. 25.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it disappears (d) it turns yellow again
26. 26.🛟 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
27. 27.True or false: plain water keeps turmeric yellow. (a) False (b) True
28. 28.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
29. 29.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) sugar water
30. 30.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
31. 31.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) sugar water (d) detergent water
32. 32.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
33. 33.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
34. 34.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
35. 35.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) a white party dress (d) your best clothes
36. 36.True or false: a balloon is needed for the turmeric test. (a) True (b) False
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) lemon juice (d) detergent water
40. 40.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) salt water (d) detergent water

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