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Turmeric Indicator Experiment Worksheet

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

Answer key

  1. True
  2. True
  3. it stays yellow
  4. a base
  5. True
  6. reddish
  7. False
  8. a magnet
  9. salt water
  10. True
  11. False
  12. lemon juice
  13. tamarind water
  14. plain water
  15. an acid
  16. soap solution
  17. False
  18. curd
  19. reddish-brown
  20. the liquid we test
  21. detergent water
  22. an old shirt or apron
  23. a comb
  24. detergent water
  25. True
  26. turns reddish-brown
  27. we change it
  28. a mirror
  29. False
  30. a magnet
  31. sugar water
  32. True
  33. False
  34. True
  35. water
  36. needed
  37. yeast
  38. False
  39. True
  40. vinegar

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