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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 414 · 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.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) salt water (d) detergent water
  2. 2.True or false: salt water keeps turmeric yellow. (a) True (b) False
  3. 3.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  4. 4.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  5. 5.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) white at once (d) green
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
  7. 7.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) reddish-brown (d) bright blue
  8. 8.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it turns blue (d) it stays yellow
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a mirror (c) turmeric powder (d) a dropper or spoon
  10. 10.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns red (d) it turns black
  11. 11.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  12. 12.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a balloon (c) a magnet (d) a mirror
  13. 13.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) plain water (d) detergent water
  14. 14.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) a mirror (d) a dropper or spoon
  15. 15.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  16. 16.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) detergent water (d) baking soda water
  17. 17.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) tamarind water (d) lemon juice
  18. 18.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) tamarind water (c) baking soda water (d) vinegar
  19. 19.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  20. 20.True or false: curd is an acid. (a) True (b) False
  21. 21.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  22. 22.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the turmeric paper (c) the liquid we test (d) the colour we see
  24. 24.True or false: water is needed for the turmeric test. (a) False (b) True
  25. 25.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
  26. 26.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) baking soda water (c) detergent water (d) soap solution
  27. 27.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  28. 28.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  29. 29.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) turmeric powder (c) lemon juice (d) a dropper or spoon
  31. 31.🫧 Which of these is a base? (a) plain water (b) orange juice (c) detergent water (d) sugar water
  32. 32.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  33. 33.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) soap solution (c) vinegar (d) sugar water
  34. 34.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  35. 35.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) yeast (d) white paper strips
  36. 36.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  37. 37.⚖️ 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
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  39. 39.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  40. 40.True or false: soap solution is not needed for the turmeric test. (a) False (b) True

Answer key

  1. detergent water
  2. True
  3. True
  4. needed
  5. reddish
  6. we change it
  7. reddish-brown
  8. reddish-brown
  9. a mirror
  10. it stays yellow
  11. needed
  12. lemon juice
  13. plain water
  14. a dropper or spoon
  15. neutral
  16. vinegar
  17. detergent water
  18. baking soda water
  19. False
  20. True
  21. not needed
  22. True
  23. the liquid we test
  24. True
  25. use only kitchen items
  26. tamarind water
  27. needed
  28. True
  29. not needed
  30. a battery cell
  31. detergent water
  32. a base
  33. soap solution
  34. needed
  35. white paper strips
  36. False
  37. we keep it the same
  38. False
  39. True
  40. False

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