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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 92 · 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 turns turmeric reddish-brown? (a) lemon juice (b) tamarind water (c) plain water (d) soap solution
  2. 2.⚖️ 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
  3. 3.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  4. 4.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  5. 5.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  6. 6.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
  7. 7.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  8. 8.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) it stays white (d) reddish-brown
  9. 9.🫧 Which of these is a base? (a) baking soda water (b) plain water (c) lemon juice (d) tamarind water
  10. 10.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the number of drops (c) the colour we see
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) soap solution (c) a balloon (d) lemon juice
  13. 13.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) lemon juice (d) plain water
  14. 14.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) lemon juice (d) vinegar
  15. 15.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  16. 16.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) salt water (c) vinegar (d) detergent water
  17. 17.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) sugar water (d) baking soda water
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) water (c) a dropper or spoon (d) turmeric powder
  19. 19.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) it turns green (d) reddish-brown
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  21. 21.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  22. 22.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  23. 23.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  24. 24.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
  25. 25.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  26. 26.🧺 Which of these is not needed for the turmeric test? (a) water (b) a battery cell (c) soap solution (d) white paper strips
  27. 27.🍋 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 turns blue (d) it disappears
  28. 28.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  29. 29.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  30. 30.True or false: lemon juice is a base. (a) True (b) False
  31. 31.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  32. 32.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
  33. 33.🫧 Which of these is an acid? (a) salt water (b) baking soda water (c) plain water (d) orange juice
  34. 34.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) soap solution (c) water (d) a dropper or spoon
  36. 36.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
  38. 38.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) white paper strips (c) water (d) yeast
  39. 39.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) tamarind water
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True

Answer key

  1. soap solution
  2. True
  3. an acid
  4. not needed
  5. False
  6. it stays yellow
  7. False
  8. reddish-brown
  9. baking soda water
  10. needed
  11. the number of drops
  12. a balloon
  13. soap solution
  14. detergent water
  15. an acid
  16. detergent water
  17. baking soda water
  18. a mirror
  19. reddish-brown
  20. True
  21. needed
  22. needed
  23. a base
  24. reddish
  25. False
  26. a battery cell
  27. it turns yellow again
  28. not needed
  29. neutral
  30. False
  31. a base
  32. an old shirt or apron
  33. orange juice
  34. True
  35. a comb
  36. stays yellow
  37. we keep it the same
  38. yeast
  39. tamarind water
  40. False

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