Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 760 · 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 neutral? (a) vinegar (b) lemon juice (c) soap solution (d) sugar water
2. 2.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
3. 3.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
4. 4.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
5. 5.⚖️ 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
6. 6.🧺 Which of these is needed for the turmeric test? (a) a comb (b) yeast (c) a magnet (d) soap solution
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
8. 8.True or false: orange juice is an acid. (a) True (b) False
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
10. 10.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
11. 11.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
12. 12.🫧 Which of these is an acid? (a) salt water (b) baking soda water (c) lemon juice (d) sugar water
13. 13.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap water is a base (d) soap is magnetic
14. 14.True or false: orange juice is neutral. (a) True (b) False
15. 15.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) salt water (c) soap solution (d) sugar water
16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) soap solution (d) a battery cell
17. 17.True or false: a magnet is needed for the turmeric test. (a) True (b) False
18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) white paper strips (d) a comb
19. 19.🫧 Which of these is an acid? (a) baking soda water (b) plain water (c) detergent water (d) curd
20. 20.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
21. 21.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) water (d) a battery cell
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
23. 23.True or false: plain water is an acid. (a) True (b) False
24. 24.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) a dropper or spoon (d) a magnet
26. 26.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.🔍 Which is the odd one out? (a) salt water (b) tamarind water (c) lemon juice (d) baking soda water
29. 29.⚖️ 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
30. 30.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) sugar water
31. 31.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
32. 32.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the number of drops (d) the light we look in
34. 34.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) it turns blue (d) reddish-brown
35. 35.⚖️ 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
36. 36.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
37. 37.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a magnet (c) a dropper or spoon (d) a balloon
38. 38.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed

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