Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 429 · 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 an acid? (a) baking soda water (b) tamarind water (c) plain water (d) sugar water
2. 2.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a mirror (c) turmeric powder (d) water
3. 3.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) bright blue (d) it stays white
4. 4.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
5. 5.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) yeast (c) water (d) a mirror
6. 6.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
7. 7.⚖️ 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 change it (c) we measure it
8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a comb (d) a dropper or spoon
9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) a balloon (d) turmeric powder
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) a mirror (d) a dropper or spoon
11. 11.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) green (d) white at once
12. 12.True or false: baking soda water is an acid. (a) False (b) True
13. 13.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
14. 14.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
15. 15.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
16. 16.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) sugar water (d) baking soda water
17. 17.🫧 Which of these is a base? (a) vinegar (b) curd (c) detergent water (d) orange juice
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the liquid we test (c) the colour we see (d) the turmeric paper
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) a magnet (d) water
20. 20.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
21. 21.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
22. 22.⚖️ 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
23. 23.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a prism (d) a magnet
24. 24.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) white paper strips (c) a battery cell (d) a balloon
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) detergent water (d) baking soda water
27. 27.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
28. 28.🍋 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
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
30. 30.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
31. 31.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
32. 32.⚖️ 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 turmeric paper (d) the light we look in
33. 33.🫧 Which of these is a base? (a) salt water (b) soap solution (c) plain water (d) vinegar
34. 34.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
35. 35.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) it turns blue (d) reddish-brown
36. 36.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
37. 37.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
38. 38.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
39. 39.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True

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