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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 219 · 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.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) reddish-brown (d) it turns blue
  2. 2.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  3. 3.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the turmeric paper (c) the colour we see (d) the light we look in
  5. 5.🫧 Which of these is an acid? (a) baking soda water (b) salt water (c) vinegar (d) soap solution
  6. 6.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your best clothes (d) your school uniform
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a battery cell (c) white paper strips (d) a dropper or spoon
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  9. 9.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  10. 10.True or false: curd is a base. (a) False (b) True
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  12. 12.🔍 Which is the odd one out? (a) sugar water (b) salt water (c) detergent water (d) tamarind water
  13. 13.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  14. 14.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  15. 15.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  17. 17.🔍 Which is the odd one out? (a) detergent water (b) vinegar (c) soap solution (d) baking soda water
  18. 18.True or false: sugar water is neutral. (a) True (b) False
  19. 19.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) lemon juice (d) a magnet
  20. 20.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  21. 21.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  22. 22.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  23. 23.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
  25. 25.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a battery cell (c) white paper strips (d) water
  26. 26.True or false: plain water is a base. (a) True (b) False
  27. 27.🫧 Which of these is neutral? (a) plain water (b) tamarind water (c) curd (d) soap solution
  28. 28.True or false: yeast is needed for the turmeric test. (a) True (b) False
  29. 29.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  30. 30.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
  31. 31.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  32. 32.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) salt water (c) vinegar (d) tamarind water
  33. 33.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  34. 34.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) white at once (d) green
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
  36. 36.True or false: a comb is needed for the turmeric test. (a) False (b) True
  37. 37.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) baking soda water (d) detergent water
  38. 38.⚖️ 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 measure it (c) we change it
  39. 39.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) salt water (c) plain water (d) tamarind water
  40. 40.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) salt water (d) baking soda water

Answer key

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

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