Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 498 · 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.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) a white party dress (d) your best clothes
2. 2.🫧 Which of these is an acid? (a) lemon juice (b) sugar water (c) salt water (d) baking soda water
3. 3.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
4. 4.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
5. 5.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) plain water
6. 6.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) tamarind water
7. 7.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
8. 8.True or false: sugar water is neutral. (a) False (b) True
9. 9.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
10. 10.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.⚖️ 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
13. 13.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) soap solution (d) baking soda water
14. 14.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
15. 15.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a dropper or spoon (c) a mirror (d) yeast
16. 16.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) tamarind water (d) vinegar
17. 17.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) white paper strips (d) a mirror
19. 19.🟡 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
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
21. 21.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution
24. 24.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
25. 25.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the number of drops (d) the liquid we test
27. 27.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) an indicator (c) a prism (d) a magnet
28. 28.True or false: detergent water keeps turmeric yellow. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) vinegar (d) baking soda water
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
31. 31.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
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.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
34. 34.🔮 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
35. 35.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) it stays white (d) bright blue
36. 36.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
37. 37.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a balloon (c) a comb (d) a magnet
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a balloon (c) water (d) white paper strips

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