Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 694 · 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? Which of these is the one thing we change? (a) the turmeric paper (b) the colour we see (c) the liquid we test (d) the light we look in
2. 2.🫧 Which of these is an acid? (a) sugar water (b) lemon juice (c) soap solution (d) baking soda water
3. 3.🛟 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
4. 4.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) baking soda water (d) vinegar
5. 5.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
6. 6.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) vinegar (c) plain water (d) tamarind water
7. 7.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
9. 9.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
10. 10.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
12. 12.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
13. 13.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
14. 14.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the colour we see (c) the liquid we test
16. 16.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is an acid (c) soap is magnetic (d) soap water is a base
17. 17.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
18. 18.🫧 Which of these is a base? (a) vinegar (b) detergent water (c) lemon juice (d) tamarind water
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) a balloon (d) soap solution
20. 20.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) plain water (c) soap solution (d) lemon juice
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
23. 23.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) turmeric powder (c) lemon juice (d) soap solution
24. 24.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
25. 25.True or false: a comb is not needed for the turmeric test. (a) False (b) True
26. 26.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
27. 27.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns blue (c) it disappears (d) it turns darker red
28. 28.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
29. 29.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
30. 30.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) reddish-brown (d) it stays white
31. 31.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) an indicator (d) a magnet
32. 32.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) soap solution (c) water (d) a magnet
33. 33.⚖️ 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
34. 34.🫧 Which of these is neutral? (a) vinegar (b) tamarind water (c) detergent water (d) salt water
35. 35.True or false: sugar water is a base. (a) True (b) False
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (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 light we look in (c) the colour we see
38. 38.⚖️ 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
39. 39.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
40. 40.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once

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