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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 889 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) soap solution (c) lemon juice (d) yeast
  3. 3.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) plain water (d) salt water
  4. 4.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is an acid (d) soap is hot
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  6. 6.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  7. 7.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  9. 9.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  10. 10.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
  11. 11.🫧 Which of these is a base? (a) salt water (b) sugar water (c) baking soda water (d) lemon juice
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the turmeric paper
  13. 13.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) a mirror (d) lemon juice
  15. 15.True or false: orange juice is neutral. (a) False (b) True
  16. 16.🫧 Which of these is an acid? (a) curd (b) detergent water (c) soap solution (d) plain water
  17. 17.🫧 Which of these is neutral? (a) plain water (b) vinegar (c) orange juice (d) detergent water
  18. 18.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
  19. 19.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) baking soda water (d) detergent water
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) tamarind water (c) plain water (d) detergent water
  21. 21.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) tamarind water (c) soap solution (d) vinegar
  22. 22.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  23. 23.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  24. 24.🫧 Which of these is an acid? (a) plain water (b) sugar water (c) detergent water (d) vinegar
  25. 25.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a battery cell (c) a balloon (d) a magnet
  26. 26.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  30. 30.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) vinegar (c) soap solution (d) sugar water
  31. 31.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) lemon juice (c) turmeric powder (d) soap solution
  33. 33.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  34. 34.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
  35. 35.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) baking soda water (d) soap solution
  36. 36.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  37. 37.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
  38. 38.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  39. 39.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) lemon juice (d) yeast

Answer key

  1. True
  2. yeast
  3. soap solution
  4. soap water is a base
  5. True
  6. not needed
  7. needed
  8. True
  9. needed
  10. reddish-brown
  11. baking soda water
  12. the turmeric paper
  13. not needed
  14. a mirror
  15. False
  16. curd
  17. plain water
  18. it stays yellow
  19. sugar water
  20. detergent water
  21. soap solution
  22. turns reddish-brown
  23. True
  24. vinegar
  25. white paper strips
  26. False
  27. we measure it
  28. we keep it the same
  29. True
  30. soap solution
  31. True
  32. a magnet
  33. False
  34. an old shirt or apron
  35. lemon juice
  36. False
  37. reddish
  38. True
  39. stays yellow
  40. yeast

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