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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 422 · 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.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) sugar water (c) tamarind water (d) lemon juice
  2. 2.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) a mirror (d) lemon juice
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  4. 4.True or false: salt water is neutral. (a) False (b) True
  5. 5.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  6. 6.🫧 Which of these is a base? (a) detergent water (b) sugar water (c) orange juice (d) plain water
  7. 7.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the liquid we test (d) the turmeric paper
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) turmeric powder (c) water (d) white paper strips
  10. 10.True or false: yeast is needed for the turmeric test. (a) False (b) True
  11. 11.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  12. 12.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns darker red (d) it turns yellow again
  13. 13.🔍 Which is the odd one out? (a) tamarind water (b) salt water (c) baking soda water (d) plain water
  14. 14.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) a white party dress (d) an old shirt or apron
  15. 15.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
  16. 16.⚖️ 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
  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) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) lemon juice (c) soap solution (d) turmeric powder
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) water (d) yeast
  22. 22.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) lemon juice (c) sugar water (d) vinegar
  23. 23.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  24. 24.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  25. 25.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) baking soda water (c) soap solution (d) detergent water
  26. 26.🫧 Which of these is an acid? (a) vinegar (b) baking soda water (c) detergent water (d) soap solution
  27. 27.True or false: salt water keeps turmeric yellow. (a) True (b) False
  28. 28.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) detergent water (c) vinegar (d) salt water
  29. 29.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  30. 30.🫧 Which of these is a base? (a) plain water (b) sugar water (c) soap solution (d) lemon juice
  31. 31.⚖️ 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
  32. 32.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  33. 33.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  34. 34.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  35. 35.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  36. 36.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) a comb (d) water
  37. 37.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) baking soda water
  38. 38.🫧 Which of these is an acid? (a) baking soda water (b) plain water (c) salt water (d) orange juice
  39. 39.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
  40. 40.True or false: a comb is not needed for the turmeric test. (a) True (b) False

Answer key

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

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