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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 440 · 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: salt water keeps turmeric yellow. (a) True (b) False
  2. 2.🫧 Which of these is an acid? (a) salt water (b) sugar water (c) detergent water (d) curd
  3. 3.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) plain water
  4. 4.🫧 Which of these is an acid? (a) sugar water (b) plain water (c) soap solution (d) tamarind water
  5. 5.True or false: water is not needed for the turmeric test. (a) False (b) True
  6. 6.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  9. 9.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  10. 10.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  11. 11.⚖️ 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 light we look in (c) the number of drops (d) the liquid we test
  12. 12.True or false: a comb is needed for the turmeric test. (a) False (b) True
  13. 13.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a comb (d) a magnet
  14. 14.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  15. 15.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it stays yellow (d) it turns red
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) soap solution (d) a battery cell
  17. 17.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  18. 18.🛟 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
  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 turns blue (d) it disappears
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a magnet (c) a dropper or spoon (d) water
  21. 21.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
  22. 22.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is an acid (c) soap water is a base (d) soap is magnetic
  23. 23.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) a balloon (d) turmeric powder
  24. 24.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) lemon juice
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  26. 26.True or false: curd is a base. (a) False (b) True
  27. 27.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) sugar water (d) lemon juice
  28. 28.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
  29. 29.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  30. 30.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a dropper or spoon (c) a magnet (d) yeast
  31. 31.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  32. 32.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  33. 33.🫧 Which of these is a base? (a) curd (b) lemon juice (c) sugar water (d) baking soda water
  34. 34.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
  35. 35.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  36. 36.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  37. 37.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) sugar water (c) salt water (d) lemon juice
  39. 39.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) vinegar
  40. 40.True or false: curd is an acid. (a) True (b) False

Answer key

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

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