Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 839 · 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.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
2. 2.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the colour we see (d) the number of drops
5. 5.⚖️ 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 liquid we test (c) the colour we see (d) the turmeric paper
6. 6.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) an old shirt or apron (d) a white party dress
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
8. 8.🫧 Which of these is neutral? (a) lemon juice (b) tamarind water (c) salt water (d) baking soda water
9. 9.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
10. 10.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
11. 11.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap is magnetic (d) soap water is a base
12. 12.⚖️ 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
13. 13.True or false: vinegar is a base. (a) True (b) False
14. 14.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
15. 15.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
16. 16.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
17. 17.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
18. 18.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) sugar water (c) soap solution (d) detergent water
19. 19.True or false: soap solution keeps turmeric yellow. (a) True (b) False
20. 20.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) vinegar (d) soap solution
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
22. 22.🍋 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
23. 23.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
24. 24.True or false: orange juice is neutral. (a) False (b) True
25. 25.⚖️ 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
26. 26.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) a mirror (d) a dropper or spoon
27. 27.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
28. 28.True or false: soap solution is a base. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) sugar water
30. 30.True or false: water is not needed for the turmeric test. (a) True (b) False
31. 31.True or false: orange juice is an acid. (a) False (b) True
32. 32.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) yeast (d) a dropper or spoon
35. 35.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
36. 36.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) sugar water (c) soap solution (d) plain water
37. 37.🫧 Which of these is neutral? (a) curd (b) detergent water (c) vinegar (d) plain water
38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) a magnet (d) lemon juice
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a balloon (d) white paper strips
40. 40.True or false: baking soda water is an acid. (a) False (b) True

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