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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 557 · 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) reddish-brown (b) it turns green (c) it stays yellow (d) it turns blue
  2. 2.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  3. 3.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a balloon (c) a dropper or spoon (d) white paper strips
  4. 4.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) sugar water (d) lemon juice
  5. 5.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) tamarind water (d) soap solution
  7. 7.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns yellow again (c) it turns darker red (d) it disappears
  8. 8.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
  9. 9.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  10. 10.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  11. 11.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) lemon juice
  12. 12.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) lemon juice (c) detergent water (d) tamarind water
  13. 13.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) tamarind water (d) sugar water
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
  15. 15.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
  16. 16.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  17. 17.True or false: lemon juice is an acid. (a) True (b) False
  18. 18.🫧 Which of these is neutral? (a) soap solution (b) plain water (c) orange juice (d) baking soda water
  19. 19.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  20. 20.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
  21. 21.True or false: tamarind water is an acid. (a) False (b) True
  22. 22.True or false: sugar water is an acid. (a) True (b) False
  23. 23.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) turmeric powder (d) a mirror
  25. 25.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) vinegar (d) soap solution
  26. 26.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  28. 28.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  29. 29.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  30. 30.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a balloon (c) a battery cell (d) a comb
  31. 31.True or false: baking soda water is a base. (a) True (b) False
  32. 32.🫧 Which of these is a base? (a) sugar water (b) detergent water (c) orange juice (d) plain water
  33. 33.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  34. 34.🫧 Which of these is an acid? (a) detergent water (b) sugar water (c) baking soda water (d) orange juice
  35. 35.True or false: baking soda water is an acid. (a) False (b) True
  36. 36.True or false: plain water is an acid. (a) False (b) True
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) soap solution (c) turmeric powder (d) a balloon
  38. 38.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) mix bathroom cleaners (d) sip each liquid
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the number of drops (c) the light we look in (d) the turmeric paper
  40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a comb (c) white paper strips (d) turmeric powder

Answer key

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

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