Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 573 · 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.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
2. 2.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
3. 3.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
6. 6.🫧 Which of these is an acid? (a) baking soda water (b) lemon juice (c) sugar water (d) detergent water
7. 7.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.True or false: orange juice is an acid. (a) False (b) True
10. 10.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
11. 11.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) vinegar (d) soap solution
12. 12.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
15. 15.True or false: baking soda water is a base. (a) True (b) False
16. 16.⚖️ 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 number of drops (c) the colour we see (d) the turmeric paper
17. 17.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) soap solution (d) baking soda water
18. 18.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) turmeric powder (c) a mirror (d) white paper strips
19. 19.⚖️ 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 change it (c) we measure it
20. 20.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) soap solution (d) lemon juice
21. 21.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
23. 23.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns darker red (d) it turns yellow again
24. 24.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
25. 25.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) water (d) a balloon
27. 27.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) white paper strips (d) a battery cell
29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) turmeric powder (c) soap solution (d) water
30. 30.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) lemon juice (c) baking soda water (d) tamarind water
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
32. 32.True or false: tamarind water is neutral. (a) False (b) True
33. 33.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) sip each liquid (d) mix bathroom cleaners
34. 34.🫧 Which of these is a base? (a) tamarind water (b) vinegar (c) soap solution (d) orange juice
35. 35.🫧 Which of these is an acid? (a) detergent water (b) baking soda water (c) orange juice (d) salt water
36. 36.⚖️ 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
37. 37.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish
38. 38.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
39. 39.⚖️ 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 number of drops (d) the colour we see
40. 40.🔍 Which is the odd one out? (a) plain water (b) vinegar (c) lemon juice (d) detergent water

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