Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 667 · 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: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
2. 2.True or false: baking soda water is neutral. (a) True (b) False
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
4. 4.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) use only kitchen items (d) mix bathroom cleaners
5. 5.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) white at once (d) green
6. 6.📘 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
7. 7.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) vinegar (d) soap solution
8. 8.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
9. 9.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
10. 10.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
12. 12.True or false: salt water keeps turmeric yellow. (a) True (b) False
13. 13.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is an acid (d) soap is hot
14. 14.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
15. 15.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) vinegar (d) soap solution
16. 16.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
17. 17.True or false: orange juice is a base. (a) False (b) True
18. 18.True or false: salt water is neutral. (a) True (b) False
19. 19.True or false: detergent water is a base. (a) False (b) True
20. 20.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
23. 23.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
24. 24.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) white paper strips (d) soap solution
26. 26.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) turmeric powder (c) a dropper or spoon (d) water
27. 27.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
28. 28.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) reddish-brown (d) it stays white
29. 29.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) soap solution (d) baking soda water
30. 30.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) salt water (c) sugar water (d) plain water
31. 31.🫧 Which of these is a base? (a) salt water (b) orange juice (c) plain water (d) detergent water
32. 32.True or false: detergent water is an acid. (a) True (b) False
33. 33.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the liquid we test (d) the number of drops
35. 35.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
36. 36.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) soap solution (c) yeast (d) a battery cell
37. 37.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) a balloon (d) turmeric powder
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 keep it the same (c) we measure it
39. 39.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) tamarind water (d) salt water
40. 40.True or false: plain water turns turmeric reddish-brown. (a) True (b) False

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