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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 707 · 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 is an acid? (a) soap solution (b) lemon juice (c) salt water (d) sugar water
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the liquid we test
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  4. 4.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
  5. 5.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  7. 7.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  8. 8.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  9. 9.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
  10. 10.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
  11. 11.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) water (d) a magnet
  12. 12.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) bright blue (d) reddish-brown
  13. 13.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  14. 14.🛟 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
  15. 15.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a magnet (c) water (d) turmeric powder
  17. 17.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) a balloon (d) a dropper or spoon
  18. 18.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) white paper strips (c) a dropper or spoon (d) lemon juice
  20. 20.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  21. 21.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap water is a base (d) soap is an acid
  22. 22.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  23. 23.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) a comb (d) turmeric powder
  26. 26.🫧 Which of these is an acid? (a) salt water (b) vinegar (c) sugar water (d) detergent water
  27. 27.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  28. 28.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  29. 29.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) sugar water (c) lemon juice (d) vinegar
  30. 30.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) tamarind water
  31. 31.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) lemon juice (c) vinegar (d) detergent water
  32. 32.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  33. 33.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  34. 34.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
  35. 35.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) soap solution (c) a dropper or spoon (d) lemon juice
  37. 37.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  38. 38.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  39. 39.🛟 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
  40. 40.True or false: lemon juice is a base. (a) True (b) False

Answer key

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

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