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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 742 · 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: vinegar turns turmeric reddish-brown. (a) True (b) False
  2. 2.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) your best clothes (d) a white party dress
  3. 3.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  4. 4.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  5. 5.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  6. 6.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) water (d) a magnet
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) water (d) a comb
  8. 8.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  9. 9.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) soap solution (c) salt water (d) vinegar
  10. 10.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a magnet (c) white paper strips (d) turmeric powder
  12. 12.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  13. 13.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) green (d) it stays white
  14. 14.🍋 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
  15. 15.True or false: salt water is a base. (a) True (b) False
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) turmeric powder (c) soap solution (d) water
  17. 17.🫧 Which of these is neutral? (a) lemon juice (b) orange juice (c) salt water (d) curd
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
  19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) yeast (d) lemon juice
  20. 20.True or false: baking soda water is a base. (a) False (b) True
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
  23. 23.True or false: yeast is needed for the turmeric test. (a) False (b) True
  24. 24.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) lemon juice (d) detergent water
  25. 25.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) baking soda water (d) salt water
  26. 26.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  27. 27.🧺 Which of these is not needed for the turmeric test? (a) water (b) turmeric powder (c) lemon juice (d) a balloon
  28. 28.🔍 Which is the odd one out? (a) detergent water (b) vinegar (c) soap solution (d) baking soda water
  29. 29.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) a mirror (d) turmeric powder
  30. 30.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  31. 31.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  32. 32.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  33. 33.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  34. 34.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) soap solution (d) a magnet
  35. 35.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  36. 36.🟡 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
  37. 37.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  38. 38.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) soap solution (c) a dropper or spoon (d) a magnet
  39. 39.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  40. 40.⚖️ 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 change it (c) we measure it

Answer key

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

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