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Turmeric Indicator Experiment Worksheet

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

Answer key

  1. True
  2. needed
  3. an acid
  4. soap solution
  5. sugar water
  6. a balloon
  7. True
  8. needed
  9. True
  10. reddish-brown
  11. a comb
  12. True
  13. tamarind water
  14. not needed
  15. reddish
  16. turns reddish-brown
  17. False
  18. turns reddish-brown
  19. stays yellow
  20. not needed
  21. True
  22. True
  23. we measure it
  24. we change it
  25. the colour we see
  26. a magnet
  27. needed
  28. False
  29. detergent water
  30. True
  31. True
  32. True
  33. False
  34. salt water
  35. yeast
  36. True
  37. False
  38. vinegar
  39. use only kitchen items
  40. stays yellow

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