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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 843 · 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: a comb is needed for the turmeric test. (a) True (b) False
  2. 2.⚖️ 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
  3. 3.⚖️ 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
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the number of drops (c) the colour we see (d) the light we look in
  5. 5.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
  6. 6.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  7. 7.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) yeast (c) a mirror (d) a comb
  8. 8.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  9. 9.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) sugar water
  10. 10.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  11. 11.True or false: orange juice is an acid. (a) True (b) False
  12. 12.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  13. 13.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  14. 14.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  15. 15.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a comb (c) a dropper or spoon (d) turmeric powder
  16. 16.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) bright blue (d) green
  17. 17.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  18. 18.True or false: lemon juice is a base. (a) True (b) False
  19. 19.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  20. 20.⚖️ 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
  21. 21.True or false: tamarind water is a base. (a) True (b) False
  22. 22.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
  23. 23.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  24. 24.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) sugar water
  25. 25.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
  27. 27.True or false: sugar water is an acid. (a) False (b) True
  28. 28.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) turmeric powder (c) a magnet (d) a mirror
  29. 29.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) it turns green (d) reddish-brown
  30. 30.True or false: salt water keeps turmeric yellow. (a) False (b) True
  31. 31.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) baking soda water (d) detergent water
  32. 32.⚖️ 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
  33. 33.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  34. 34.True or false: vinegar is an acid. (a) False (b) True
  35. 35.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  36. 36.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  38. 38.🫧 Which of these is neutral? (a) tamarind water (b) soap solution (c) orange juice (d) sugar water
  39. 39.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) sugar water (c) soap solution (d) tamarind water
  40. 40.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a magnet (c) white paper strips (d) turmeric powder

Answer key

  1. False
  2. we measure it
  3. we keep it the same
  4. the colour we see
  5. soap solution
  6. neutral
  7. a dropper or spoon
  8. True
  9. sugar water
  10. not needed
  11. True
  12. a base
  13. turns reddish-brown
  14. True
  15. a comb
  16. reddish-brown
  17. an acid
  18. False
  19. needed
  20. True
  21. False
  22. use only kitchen items
  23. stays yellow
  24. sugar water
  25. it stays yellow
  26. we keep it the same
  27. False
  28. turmeric powder
  29. reddish-brown
  30. True
  31. lemon juice
  32. we keep it the same
  33. False
  34. True
  35. True
  36. an acid
  37. True
  38. sugar water
  39. soap solution
  40. a magnet

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