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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 820 · 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.True or false: lemon juice is an acid. (a) True (b) False
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) a mirror (d) water
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
  4. 4.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) baking soda water (d) soap solution
  6. 6.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) vinegar (d) soap solution
  7. 7.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  8. 8.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  9. 9.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  10. 10.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the liquid we test (c) the turmeric paper (d) the light we look in
  12. 12.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  13. 13.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  14. 14.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  15. 15.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  16. 16.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) it turns green (d) reddish-brown
  17. 17.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) an old shirt or apron (d) your school uniform
  18. 18.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  19. 19.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  20. 20.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a balloon (c) a battery cell (d) a magnet
  21. 21.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  22. 22.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it turns blue (d) it disappears
  23. 23.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) tamarind water (c) lemon juice (d) plain water
  24. 24.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) vinegar (d) detergent water
  25. 25.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap water is a base (d) soap is magnetic
  26. 26.🫧 Which of these is an acid? (a) salt water (b) lemon juice (c) plain water (d) baking soda water
  27. 27.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) lemon juice (d) yeast
  29. 29.⚖️ 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
  30. 30.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) bright blue (d) it stays white
  31. 31.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  32. 32.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) white paper strips (c) water (d) turmeric powder
  34. 34.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
  35. 35.True or false: lemon juice is a base. (a) False (b) True
  36. 36.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  38. 38.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  39. 39.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
  40. 40.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a dropper or spoon (c) a magnet (d) a comb

Answer key

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

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