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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 898 · 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? True or false: the liquid we test is the one thing we change. (a) True (b) False
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
  3. 3.True or false: plain water is an acid. (a) False (b) True
  4. 4.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  7. 7.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  8. 8.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) sugar water (c) baking soda water (d) soap solution
  9. 9.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
  10. 10.⚖️ 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
  11. 11.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
  12. 12.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  13. 13.True or false: tamarind water is an acid. (a) False (b) True
  14. 14.True or false: soap solution is an acid. (a) True (b) False
  15. 15.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  16. 16.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  17. 17.⚖️ 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
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
  19. 19.True or false: lemon juice is a base. (a) True (b) False
  20. 20.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  21. 21.🔍 Which is the odd one out? (a) sugar water (b) vinegar (c) tamarind water (d) baking soda water
  22. 22.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) sugar water (c) detergent water (d) vinegar
  23. 23.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  25. 25.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  26. 26.True or false: water is needed for the turmeric test. (a) True (b) False
  27. 27.🫧 Which of these is a base? (a) vinegar (b) tamarind water (c) soap solution (d) salt water
  28. 28.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) turmeric powder (c) a magnet (d) a comb
  29. 29.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the turmeric paper (c) the number of drops (d) the liquid we test
  31. 31.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) vinegar (d) soap solution
  32. 32.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) detergent water (d) vinegar
  35. 35.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) lemon juice (c) sugar water (d) plain water
  36. 36.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  37. 37.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  38. 38.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) a dropper or spoon (c) white paper strips (d) soap solution
  39. 39.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  40. 40.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid

Answer key

  1. True
  2. the turmeric paper
  3. False
  4. soap solution
  5. we keep it the same
  6. we keep it the same
  7. True
  8. sugar water
  9. use only kitchen items
  10. True
  11. reddish-brown
  12. True
  13. True
  14. False
  15. False
  16. True
  17. we change it
  18. False
  19. False
  20. needed
  21. baking soda water
  22. detergent water
  23. False
  24. True
  25. needed
  26. True
  27. soap solution
  28. turmeric powder
  29. True
  30. the colour we see
  31. vinegar
  32. turns reddish-brown
  33. False
  34. detergent water
  35. soap solution
  36. True
  37. False
  38. a battery cell
  39. needed
  40. an acid

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