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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 366 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the number of drops (c) the light we look in (d) the liquid we test
  2. 2.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  3. 3.🫧 Which of these is an acid? (a) detergent water (b) plain water (c) vinegar (d) sugar water
  4. 4.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
  6. 6.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) soap solution (d) a mirror
  9. 9.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) baking soda water (d) soap solution
  10. 10.🍋 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
  11. 11.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  12. 12.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  13. 13.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  14. 14.⚖️ 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 keep it the same (c) we change it
  15. 15.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  16. 16.True or false: soap solution is a base. (a) False (b) True
  17. 17.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  18. 18.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  19. 19.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) a dropper or spoon (d) a balloon
  20. 20.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
  21. 21.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  22. 22.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) plain water (d) soap solution
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) a comb (d) lemon juice
  24. 24.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  25. 25.⚖️ 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 turmeric paper (c) the colour we see (d) the liquid we test
  26. 26.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) salt water (c) plain water (d) soap solution
  27. 27.🫧 Which of these is an acid? (a) salt water (b) soap solution (c) lemon juice (d) sugar water
  28. 28.🔮 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
  29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) water (d) soap solution
  30. 30.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  31. 31.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  32. 32.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) yeast (d) lemon juice
  33. 33.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  34. 34.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  35. 35.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) salt water (d) plain water
  36. 36.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  37. 37.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution
  38. 38.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  39. 39.True or false: plain water keeps turmeric yellow. (a) True (b) False
  40. 40.🧺 Which of these is needed for the turmeric test? (a) yeast (b) white paper strips (c) a mirror (d) a magnet

Answer key

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

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