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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 269 · 40 questions
TalentJR

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.

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  1. 1.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) baking soda water (d) soap solution
  2. 2.🫧 Which of these is an acid? (a) detergent water (b) baking soda water (c) sugar water (d) lemon juice
  3. 3.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  4. 4.True or false: salt water is neutral. (a) False (b) True
  5. 5.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  6. 6.🫧 Which of these is an acid? (a) plain water (b) salt water (c) sugar water (d) orange juice
  7. 7.🫧 Which of these is a base? (a) sugar water (b) baking soda water (c) curd (d) salt water
  8. 8.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) a dropper or spoon (d) a comb
  9. 9.True or false: salt water keeps turmeric yellow. (a) False (b) True
  10. 10.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) sugar water
  11. 11.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  12. 12.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  14. 14.🔍 Which is the odd one out? (a) tamarind water (b) detergent water (c) soap solution (d) baking soda water
  15. 15.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
  16. 16.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  17. 17.⚖️ 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
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) soap solution (c) water (d) white paper strips
  19. 19.🫧 Which of these is an acid? (a) plain water (b) sugar water (c) baking soda water (d) tamarind water
  20. 20.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  21. 21.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) salt water (d) soap solution
  22. 22.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  23. 23.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
  24. 24.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  25. 25.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) water (c) a dropper or spoon (d) turmeric powder
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the turmeric paper (c) the light we look in (d) the liquid we test
  28. 28.🫧 Which of these is neutral? (a) orange juice (b) curd (c) plain water (d) vinegar
  29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) turmeric powder (d) a battery cell
  30. 30.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  32. 32.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  33. 33.⚖️ 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
  34. 34.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) tamarind water (d) baking soda water
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) yeast (c) turmeric powder (d) lemon juice
  36. 36.True or false: plain water is neutral. (a) False (b) True
  37. 37.🫧 Which of these is neutral? (a) orange juice (b) tamarind water (c) sugar water (d) curd
  38. 38.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
  39. 39.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a balloon (c) soap solution (d) turmeric powder
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it

Answer key

  1. lemon juice
  2. lemon juice
  3. not needed
  4. True
  5. stays yellow
  6. orange juice
  7. baking soda water
  8. a comb
  9. True
  10. sugar water
  11. needed
  12. not needed
  13. False
  14. tamarind water
  15. vinegar
  16. an acid
  17. we change it
  18. a balloon
  19. tamarind water
  20. False
  21. soap solution
  22. stays yellow
  23. reddish-brown
  24. it stays yellow
  25. False
  26. a magnet
  27. the colour we see
  28. plain water
  29. a battery cell
  30. needed
  31. False
  32. stays yellow
  33. True
  34. baking soda water
  35. yeast
  36. True
  37. sugar water
  38. soap solution
  39. a balloon
  40. we keep it the same

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