Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 103 · 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 turns turmeric reddish-brown? (a) lemon juice (b) salt water (c) detergent water (d) sugar water
2. 2.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) salt water
3. 3.True or false: soap solution is needed for the turmeric test. (a) True (b) False
4. 4.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a magnet (d) white paper strips
6. 6.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) plain water (d) lemon juice
7. 7.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) turmeric powder (c) soap solution (d) water
8. 8.⚖️ 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
9. 9.🫧 Which of these is neutral? (a) baking soda water (b) tamarind water (c) salt water (d) orange juice
10. 10.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
13. 13.🫧 Which of these is an acid? (a) baking soda water (b) sugar water (c) lemon juice (d) soap solution
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the turmeric paper (d) the light we look in
15. 15.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
16. 16.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
17. 17.⚖️ 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 colour we see (c) the light we look in (d) the turmeric paper
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
19. 19.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
20. 20.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
21. 21.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
22. 22.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
23. 23.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) soap solution (d) a comb
24. 24.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) salt water (c) vinegar (d) soap solution
26. 26.⚖️ 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
27. 27.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) an indicator (d) a pulley
28. 28.True or false: detergent water keeps turmeric yellow. (a) False (b) True
29. 29.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) lemon juice (c) soap solution (d) water
30. 30.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is hot (d) soap is magnetic
31. 31.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
33. 33.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
34. 34.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
35. 35.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
36. 36.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) soap solution (d) detergent water
37. 37.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns darker red (d) it turns yellow again
38. 38.True or false: curd is an acid. (a) True (b) False
39. 39.True or false: lemon juice is neutral. (a) False (b) True
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False

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