Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 923 · 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.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
2. 2.True or false: a comb is not needed for the turmeric test. (a) False (b) True
3. 3.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) lemon juice (c) soap solution (d) turmeric powder
6. 6.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
7. 7.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
9. 9.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a balloon (c) white paper strips (d) turmeric powder
11. 11.True or false: detergent water keeps turmeric yellow. (a) False (b) True
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
13. 13.True or false: soap solution is a base. (a) False (b) True
14. 14.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
15. 15.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it disappears (d) it turns blue
16. 16.🫧 Which of these is an acid? (a) lemon juice (b) plain water (c) salt water (d) detergent water
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
19. 19.⚖️ 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
20. 20.⚖️ 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
21. 21.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a balloon (c) a mirror (d) a magnet
22. 22.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) sugar water (d) lemon juice
23. 23.📘 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
24. 24.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
25. 25.⚖️ 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
26. 26.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) soap solution (c) a mirror (d) lemon juice
27. 27.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) yeast (d) soap solution
28. 28.True or false: water is not needed for the turmeric test. (a) True (b) False
29. 29.🫧 Which of these is neutral? (a) curd (b) soap solution (c) plain water (d) baking soda water
30. 30.True or false: detergent water is a base. (a) False (b) True
31. 31.🔮 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
32. 32.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) reddish (d) green
33. 33.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
34. 34.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
35. 35.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) soap solution (d) lemon juice
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the turmeric paper
37. 37.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) your best clothes (d) an old shirt or apron
38. 38.True or false: detergent water is an acid. (a) True (b) False
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.True or false: lemon juice is a base. (a) False (b) True

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