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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 229 · 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? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a mirror (c) turmeric powder (d) soap solution
  4. 4.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  5. 5.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  6. 6.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
  7. 7.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  8. 8.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  9. 9.True or false: yeast is needed for the turmeric test. (a) True (b) False
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) a magnet (d) lemon juice
  11. 11.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) soap solution (c) lemon juice (d) a dropper or spoon
  13. 13.🫧 Which of these is neutral? (a) baking soda water (b) lemon juice (c) curd (d) salt water
  14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) yeast (d) soap solution
  15. 15.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  16. 16.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
  17. 17.True or false: a comb is not needed for the turmeric test. (a) False (b) True
  18. 18.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  19. 19.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) sip each liquid (d) use only kitchen items
  20. 20.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  21. 21.⚖️ 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 light we look in (d) the liquid we test
  22. 22.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the number of drops (d) the light we look in
  24. 24.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  25. 25.True or false: vinegar is a base. (a) True (b) False
  26. 26.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
  28. 28.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
  30. 30.True or false: sugar water is an acid. (a) True (b) False
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  32. 32.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns darker red (c) it turns blue (d) it turns yellow again
  33. 33.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) soap solution (d) baking soda water
  34. 34.🫧 Which of these is an acid? (a) tamarind water (b) detergent water (c) salt water (d) sugar water
  35. 35.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  36. 36.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
  37. 37.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  38. 38.True or false: tamarind water is neutral. (a) False (b) True
  39. 39.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) vinegar (c) soap solution (d) sugar water
  40. 40.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed

Answer key

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

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