Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 293 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.True or false: salt water keeps turmeric yellow. (a) False (b) True
3. 3.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) vinegar
4. 4.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) turmeric powder (c) lemon juice (d) soap solution
7. 7.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a comb (c) water (d) a mirror
8. 8.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) a balloon (d) soap solution
9. 9.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) lemon juice (d) sugar water
10. 10.🔮 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
11. 11.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
12. 12.🫧 Which of these is an acid? (a) soap solution (b) lemon juice (c) plain water (d) detergent water
13. 13.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns blue (d) it turns yellow again
14. 14.🫧 Which of these is an acid? (a) plain water (b) curd (c) baking soda water (d) sugar water
15. 15.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
16. 16.True or false: water is needed for the turmeric test. (a) False (b) True
17. 17.True or false: a magnet is needed for the turmeric test. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) vinegar (d) tamarind water
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) plain water
21. 21.⚖️ 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
22. 22.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
23. 23.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
24. 24.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
26. 26.True or false: salt water is neutral. (a) True (b) False
27. 27.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is an acid (d) soap is hot
28. 28.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) soap solution (c) a magnet (d) water
29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) a battery cell (d) lemon juice
30. 30.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
31. 31.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) salt water
32. 32.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) detergent water (c) plain water (d) lemon juice
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the light we look in (c) the turmeric paper (d) the liquid we test
34. 34.True or false: salt water is an acid. (a) True (b) False
35. 35.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
38. 38.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
40. 40.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) reddish-brown (d) green

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