Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 755 · 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) green (b) reddish (c) white at once (d) bright blue
2. 2.🫧 Which of these is a base? (a) orange juice (b) detergent water (c) lemon juice (d) salt water
3. 3.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
4. 4.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
5. 5.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
6. 6.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) reddish-brown (d) it turns blue
7. 7.True or false: soap solution is needed for the turmeric test. (a) False (b) True
8. 8.True or false: vinegar is a base. (a) True (b) False
9. 9.True or false: baking soda water is a base. (a) True (b) False
10. 10.📘 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
11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) yeast (d) a dropper or spoon
12. 12.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) sugar water
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
15. 15.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) white paper strips (c) lemon juice (d) a dropper or spoon
17. 17.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
18. 18.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
19. 19.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
20. 20.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
21. 21.⚖️ 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
22. 22.True or false: salt water keeps turmeric yellow. (a) True (b) False
23. 23.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
24. 24.🫧 Which of these is an acid? (a) orange juice (b) sugar water (c) salt water (d) soap solution
25. 25.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
26. 26.🫧 Which of these is neutral? (a) baking soda water (b) soap solution (c) detergent water (d) salt water
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
29. 29.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
30. 30.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
31. 31.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) white paper strips (c) yeast (d) a magnet
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) white paper strips (d) lemon juice
33. 33.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) turmeric powder (c) white paper strips (d) a battery cell
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
35. 35.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) bright blue (c) reddish-brown (d) green
36. 36.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) sniff each bottle hard (d) use only kitchen items
37. 37.⚖️ 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
38. 38.True or false: vinegar keeps turmeric yellow. (a) False (b) True
39. 39.🫧 Which of these is a base? (a) lemon juice (b) curd (c) vinegar (d) soap solution
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) white paper strips (c) water (d) lemon juice

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