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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 550 · 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.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the turmeric paper (c) the colour we see (d) the liquid we test
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
  4. 4.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  5. 5.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  6. 6.🫧 Which of these is a base? (a) vinegar (b) salt water (c) soap solution (d) plain water
  7. 7.True or false: salt water keeps turmeric yellow. (a) True (b) False
  8. 8.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  9. 9.⚖️ 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
  10. 10.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  11. 11.True or false: soap solution is a base. (a) False (b) True
  12. 12.🛟 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
  13. 13.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  14. 14.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  15. 15.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
  16. 16.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
  17. 17.True or false: a comb is needed for the turmeric test. (a) True (b) False
  18. 18.True or false: salt water is an acid. (a) False (b) True
  19. 19.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  20. 20.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) white paper strips (c) yeast (d) a mirror
  21. 21.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  22. 22.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a magnet (d) soap solution
  24. 24.🔍 Which is the odd one out? (a) lemon juice (b) sugar water (c) plain water (d) soap solution
  25. 25.⚖️ 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
  26. 26.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  28. 28.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  29. 29.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  30. 30.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  31. 31.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
  32. 32.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  33. 33.🫧 Which of these is neutral? (a) tamarind water (b) plain water (c) detergent water (d) curd
  34. 34.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) tamarind water (d) soap solution
  35. 35.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  36. 36.🧺 Which of these is needed for the turmeric test? (a) water (b) yeast (c) a battery cell (d) a balloon
  37. 37.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) salt water (d) vinegar
  38. 38.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap water is a base (d) soap is an acid
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) a dropper or spoon (d) a mirror
  40. 40.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base

Answer key

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

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