Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 846 · 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.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) lemon juice (d) yeast
2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) yeast (c) lemon juice (d) water
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the turmeric paper (c) the liquid we test (d) the colour we see
4. 4.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
5. 5.True or false: lemon juice is a base. (a) True (b) False
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.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
8. 8.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) bright blue (c) green (d) reddish-brown
9. 9.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) mix bathroom cleaners (d) use only kitchen items
10. 10.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) soap solution (d) salt water
11. 11.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
12. 12.True or false: vinegar is an acid. (a) False (b) True
13. 13.⚖️ 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
14. 14.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
15. 15.True or false: tamarind water is an acid. (a) False (b) True
16. 16.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
17. 17.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
19. 19.🍋 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
20. 20.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is magnetic (d) soap is an acid
21. 21.🔍 Which is the odd one out? (a) salt water (b) soap solution (c) baking soda water (d) detergent water
22. 22.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) lemon juice (c) plain water (d) soap solution
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a dropper or spoon (c) yeast (d) water
25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) turmeric powder (d) a comb
26. 26.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
27. 27.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
28. 28.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
29. 29.⚖️ 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
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 measure it (c) we keep it the same
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
32. 32.🫧 Which of these is a base? (a) vinegar (b) curd (c) soap solution (d) lemon juice
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
34. 34.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) an indicator (c) a magnet (d) a prism
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) white paper strips (d) a magnet
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 reddish-brown? (a) sugar water (b) salt water (c) baking soda water (d) lemon juice
38. 38.True or false: curd is neutral. (a) True (b) False
39. 39.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
40. 40.🧺 Do we need water for the turmeric test? (a) not needed (b) needed

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