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Turmeric Indicator Experiment Worksheet

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

Answer key

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

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