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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 541 · 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.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  2. 2.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  3. 3.True or false: lemon juice is an acid. (a) False (b) True
  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 measure it (c) we change it
  5. 5.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  6. 6.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  7. 7.🟡 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
  8. 8.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  9. 9.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  10. 10.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  11. 11.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  12. 12.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) lemon juice (c) tamarind water (d) salt water
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a magnet (c) soap solution (d) turmeric powder
  15. 15.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) it stays white (d) bright blue
  16. 16.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  17. 17.True or false: yeast is needed for the turmeric test. (a) True (b) False
  18. 18.⚖️ 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
  19. 19.⚖️ 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 number of drops (d) the light we look in
  20. 20.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
  21. 21.True or false: orange juice is an acid. (a) True (b) False
  22. 22.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  23. 23.🫧 Which of these is a base? (a) detergent water (b) lemon juice (c) tamarind water (d) vinegar
  24. 24.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a battery cell (d) white paper strips
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) white paper strips (c) a dropper or spoon (d) soap solution
  29. 29.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) a battery cell (d) water
  30. 30.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) baking soda water (d) soap solution
  31. 31.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  32. 32.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) lemon juice (d) soap solution
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) yeast (d) white paper strips
  34. 34.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) salt water (c) detergent water (d) soap solution
  35. 35.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  36. 36.🫧 Which of these is an acid? (a) lemon juice (b) detergent water (c) plain water (d) sugar water
  37. 37.True or false: water is not needed for the turmeric test. (a) False (b) True
  38. 38.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) soap solution (c) vinegar (d) sugar water
  39. 39.🫧 Which of these is neutral? (a) lemon juice (b) sugar water (c) soap solution (d) vinegar
  40. 40.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) plain water

Answer key

  1. an acid
  2. not needed
  3. True
  4. we change it
  5. needed
  6. an acid
  7. soap water is a base
  8. an acid
  9. a base
  10. False
  11. stays yellow
  12. detergent water
  13. True
  14. a magnet
  15. reddish-brown
  16. True
  17. False
  18. we keep it the same
  19. the liquid we test
  20. an old shirt or apron
  21. True
  22. needed
  23. detergent water
  24. False
  25. False
  26. a battery cell
  27. True
  28. a magnet
  29. water
  30. tamarind water
  31. True
  32. soap solution
  33. yeast
  34. salt water
  35. stays yellow
  36. lemon juice
  37. False
  38. soap solution
  39. sugar water
  40. plain water

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