Turmeric Indicator Experiment Worksheet

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

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