Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 512 · 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.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
2. 2.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
3. 3.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) water (c) lemon juice (d) a comb
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) soap solution (d) a balloon
6. 6.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
8. 8.True or false: plain water keeps turmeric yellow. (a) False (b) True
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
10. 10.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) yeast (d) turmeric powder
11. 11.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
12. 12.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) white paper strips (c) lemon juice (d) water
13. 13.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) reddish (d) bright blue
14. 14.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
15. 15.🫧 Which of these is neutral? (a) baking soda water (b) detergent water (c) lemon juice (d) salt water
16. 16.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
17. 17.True or false: soap solution is a base. (a) False (b) True
18. 18.🫧 Which of these is a base? (a) lemon juice (b) baking soda water (c) orange juice (d) salt water
19. 19.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) vinegar (d) soap solution
20. 20.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) lemon juice (c) salt water (d) vinegar
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) soap solution (c) plain water (d) lemon juice
22. 22.⚖️ 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
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the light we look in (d) the turmeric paper
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
26. 26.⚖️ 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 colour we see (d) the turmeric paper
27. 27.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
28. 28.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
29. 29.True or false: curd is a base. (a) True (b) False
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) salt water (d) detergent water
32. 32.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
33. 33.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
34. 34.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is magnetic (d) soap is hot
35. 35.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
36. 36.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) an indicator (c) a pulley (d) a magnet
37. 37.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
38. 38.🔍 Which is the odd one out? (a) baking soda water (b) tamarind water (c) detergent water (d) soap solution
39. 39.True or false: tamarind water is an acid. (a) True (b) False
40. 40.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True

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