Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 535 · 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.🫧 Which of these is a base? (a) curd (b) tamarind water (c) orange juice (d) baking soda water
2. 2.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) baking soda water (c) sugar water (d) vinegar
3. 3.🍋 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
4. 4.True or false: a comb is not needed for the turmeric test. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) sugar water (d) detergent water
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the number of drops
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
8. 8.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a mirror (c) a comb (d) a magnet
9. 9.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the turmeric paper (d) the colour we see
11. 11.True or false: soap solution is neutral. (a) False (b) True
12. 12.True or false: plain water is neutral. (a) True (b) False
13. 13.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
15. 15.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
16. 16.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) salt water
17. 17.True or false: tamarind water is an acid. (a) True (b) False
18. 18.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
19. 19.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
20. 20.🟡 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
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) False (b) True
22. 22.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) water (c) turmeric powder (d) white paper strips
26. 26.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your best clothes (d) your school uniform
27. 27.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) vinegar (d) soap solution
28. 28.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
29. 29.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
30. 30.True or false: orange juice is an acid. (a) False (b) True
31. 31.🔮 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
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the light we look in
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
34. 34.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) lemon juice (d) soap solution
35. 35.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) use only kitchen items (d) sniff each bottle hard
36. 36.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) soap solution (c) a dropper or spoon (d) water
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a mirror (c) turmeric powder (d) a dropper or spoon
40. 40.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) yeast (c) water (d) a comb

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