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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 472 · 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.

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

Answer key

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

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