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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 178 · 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.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
  3. 3.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) vinegar
  4. 4.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  5. 5.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) green (d) bright blue
  6. 6.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  7. 7.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  8. 8.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) white paper strips (d) a magnet
  10. 10.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  11. 11.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
  12. 12.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  13. 13.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  14. 14.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  15. 15.True or false: detergent water is an acid. (a) False (b) True
  16. 16.🫧 Which of these is neutral? (a) soap solution (b) salt water (c) curd (d) lemon juice
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) lemon juice (d) a comb
  18. 18.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  19. 19.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap is an acid (d) soap water is a base
  20. 20.⚖️ 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
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  22. 22.🔍 Which is the odd one out? (a) sugar water (b) baking soda water (c) soap solution (d) detergent water
  23. 23.🔮 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
  24. 24.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) vinegar
  25. 25.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  26. 26.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  27. 27.True or false: baking soda water is an acid. (a) False (b) True
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) a balloon (d) water
  29. 29.🫧 Which of these is a base? (a) sugar water (b) curd (c) soap solution (d) lemon juice
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the number of drops
  31. 31.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) yeast (c) a dropper or spoon (d) lemon juice
  33. 33.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a mirror (d) a magnet
  34. 34.True or false: tamarind water is a base. (a) False (b) True
  35. 35.🫧 Which of these is neutral? (a) soap solution (b) orange juice (c) baking soda water (d) plain water
  36. 36.True or false: sugar water is an acid. (a) False (b) True
  37. 37.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) baking soda water (d) detergent water
  38. 38.⚖️ 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
  39. 39.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a balloon (c) lemon juice (d) a dropper or spoon
  40. 40.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True

Answer key

  1. needed
  2. we keep it the same
  3. vinegar
  4. False
  5. reddish
  6. False
  7. an acid
  8. turns reddish-brown
  9. a magnet
  10. needed
  11. use only kitchen items
  12. an acid
  13. True
  14. an acid
  15. False
  16. salt water
  17. a comb
  18. neutral
  19. soap water is a base
  20. we change it
  21. False
  22. sugar water
  23. it stays yellow
  24. vinegar
  25. False
  26. True
  27. False
  28. a balloon
  29. soap solution
  30. the colour we see
  31. True
  32. yeast
  33. lemon juice
  34. False
  35. plain water
  36. False
  37. salt water
  38. False
  39. a balloon
  40. True

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