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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 950 · 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.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  2. 2.True or false: tamarind water is neutral. (a) False (b) True
  3. 3.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  4. 4.🫧 Which of these is an acid? (a) detergent water (b) plain water (c) sugar water (d) vinegar
  5. 5.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  7. 7.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  8. 8.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a dropper or spoon (c) lemon juice (d) a balloon
  10. 10.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) sugar water (c) tamarind water (d) lemon juice
  11. 11.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  14. 14.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) a mirror (d) soap solution
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) yeast (c) white paper strips (d) water
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) a comb (d) lemon juice
  18. 18.🍋 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
  19. 19.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  20. 20.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  21. 21.⚖️ 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
  22. 22.True or false: lemon juice is an acid. (a) True (b) False
  23. 23.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
  24. 24.🔍 Which is the odd one out? (a) soap solution (b) vinegar (c) sugar water (d) plain water
  25. 25.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  26. 26.True or false: baking soda water is neutral. (a) True (b) False
  27. 27.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  28. 28.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  29. 29.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap is hot (d) soap water is a base
  30. 30.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) your best clothes (d) a white party dress
  31. 31.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  32. 32.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a dropper or spoon (c) a mirror (d) yeast
  33. 33.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  34. 34.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the turmeric paper
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) soap solution (d) a battery cell
  37. 37.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  38. 38.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) tamarind water (d) soap solution
  39. 39.True or false: soap solution is a base. (a) False (b) True
  40. 40.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) vinegar (d) lemon juice

Answer key

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

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