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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 246 · 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.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is an acid (d) soap is hot
  3. 3.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) turmeric powder (c) yeast (d) a mirror
  4. 4.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  5. 5.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  6. 6.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  8. 8.True or false: vinegar is a base. (a) False (b) True
  9. 9.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a mirror (d) soap solution
  11. 11.⚖️ 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
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the turmeric paper (c) the liquid we test (d) the number of drops
  13. 13.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  16. 16.True or false: lemon juice is an acid. (a) False (b) True
  17. 17.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) yeast (d) water
  18. 18.🫧 Which of these is a base? (a) plain water (b) tamarind water (c) detergent water (d) sugar water
  19. 19.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  20. 20.True or false: salt water keeps turmeric yellow. (a) True (b) False
  21. 21.True or false: detergent water is an acid. (a) True (b) False
  22. 22.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) lemon juice (d) detergent water
  23. 23.🫧 Which of these is an acid? (a) lemon juice (b) soap solution (c) salt water (d) plain water
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) turmeric powder (c) white paper strips (d) a dropper or spoon
  25. 25.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) vinegar (d) soap solution
  26. 26.True or false: sugar water is neutral. (a) True (b) False
  27. 27.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
  28. 28.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  29. 29.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  31. 31.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  32. 32.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) tamarind water (d) soap solution
  33. 33.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) sugar water (d) lemon juice
  34. 34.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) plain water (c) sugar water (d) tamarind water
  35. 35.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  36. 36.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
  38. 38.True or false: detergent water is a base. (a) True (b) False
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) yeast (c) a dropper or spoon (d) lemon juice
  40. 40.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True

Answer key

  1. stays yellow
  2. soap water is a base
  3. turmeric powder
  4. True
  5. False
  6. reddish-brown
  7. we keep it the same
  8. False
  9. tamarind water
  10. a mirror
  11. we keep it the same
  12. the liquid we test
  13. needed
  14. True
  15. True
  16. True
  17. water
  18. detergent water
  19. stays yellow
  20. True
  21. False
  22. lemon juice
  23. lemon juice
  24. a magnet
  25. vinegar
  26. True
  27. reddish
  28. a base
  29. needed
  30. we measure it
  31. needed
  32. soap solution
  33. soap solution
  34. baking soda water
  35. True
  36. needed
  37. the number of drops
  38. True
  39. yeast
  40. True

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