Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 374 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) white paper strips (d) a comb
2. 2.True or false: a mirror is needed for the turmeric test. (a) True (b) False
3. 3.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
4. 4.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) tamarind water (c) baking soda water (d) plain water
5. 5.True or false: salt water keeps turmeric yellow. (a) True (b) False
6. 6.⚖️ 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 colour we see (d) the light we look in
7. 7.🫧 Which of these is an acid? (a) sugar water (b) vinegar (c) detergent water (d) salt water
8. 8.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a battery cell (c) white paper strips (d) water
9. 9.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a magnet (c) lemon juice (d) a mirror
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
12. 12.🫧 Which of these is a base? (a) baking soda water (b) lemon juice (c) vinegar (d) sugar water
13. 13.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) an indicator (c) a prism (d) a pulley
14. 14.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) soap solution (d) detergent water
15. 15.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
16. 16.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
17. 17.🫧 Which of these is neutral? (a) orange juice (b) salt water (c) vinegar (d) soap solution
18. 18.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap water is a base (d) soap is hot
19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
20. 20.🔍 Which is the odd one out? (a) detergent water (b) vinegar (c) soap solution (d) baking soda water
21. 21.🛟 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
22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
23. 23.🫧 Which of these is a base? (a) vinegar (b) soap solution (c) plain water (d) tamarind water
24. 24.True or false: lemon juice is a base. (a) False (b) True
25. 25.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
26. 26.True or false: detergent water keeps turmeric yellow. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) sugar water (d) soap solution
28. 28.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a balloon (d) a dropper or spoon
30. 30.True or false: lemon juice is neutral. (a) True (b) False
31. 31.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) a white party dress (d) your school uniform
34. 34.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
35. 35.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
37. 37.True or false: a comb is needed for the turmeric test. (a) True (b) False
38. 38.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) sugar water (c) baking soda water (d) detergent water
39. 39.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a magnet (c) water (d) a dropper or spoon

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