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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 803 · 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 rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) use only kitchen items (d) sniff each bottle hard
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) yeast (c) lemon juice (d) water
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
  4. 4.🔍 Which is the odd one out? (a) lemon juice (b) sugar water (c) vinegar (d) soap solution
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) a dropper or spoon (c) water (d) soap solution
  6. 6.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  7. 7.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  8. 8.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) plain water (c) salt water (d) detergent water
  9. 9.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a balloon (c) yeast (d) a magnet
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) water (c) a mirror (d) lemon juice
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the colour we see (c) the number of drops (d) the liquid we test
  13. 13.🫧 Which of these is an acid? (a) salt water (b) plain water (c) vinegar (d) detergent water
  14. 14.🫧 Which of these is a base? (a) lemon juice (b) plain water (c) soap solution (d) salt water
  15. 15.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  16. 16.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) a battery cell (d) lemon juice
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  18. 18.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  19. 19.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) water (c) a magnet (d) a balloon
  20. 20.True or false: plain water keeps turmeric yellow. (a) True (b) False
  21. 21.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  23. 23.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  24. 24.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  25. 25.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  26. 26.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
  27. 27.True or false: plain water is neutral. (a) False (b) True
  28. 28.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution
  29. 29.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) a comb (d) lemon juice
  30. 30.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
  31. 31.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  32. 32.True or false: yeast is needed for the turmeric test. (a) False (b) True
  33. 33.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) vinegar
  34. 34.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) it stays white (d) green
  35. 35.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  36. 36.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  37. 37.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) soap solution (c) turmeric powder (d) white paper strips
  39. 39.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  40. 40.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) tamarind water (c) vinegar (d) soap solution

Answer key

  1. use only kitchen items
  2. yeast
  3. the number of drops
  4. soap solution
  5. a comb
  6. an acid
  7. an acid
  8. detergent water
  9. white paper strips
  10. a mirror
  11. True
  12. the colour we see
  13. vinegar
  14. soap solution
  15. not needed
  16. lemon juice
  17. we keep it the same
  18. not needed
  19. water
  20. True
  21. False
  22. False
  23. stays yellow
  24. True
  25. False
  26. reddish-brown
  27. True
  28. soap solution
  29. a comb
  30. reddish
  31. not needed
  32. False
  33. vinegar
  34. reddish-brown
  35. False
  36. False
  37. a base
  38. a magnet
  39. stays yellow
  40. soap solution

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