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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 595 · 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.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  3. 3.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  4. 4.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  5. 5.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  6. 6.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) tamarind water (d) sugar water
  7. 7.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) lemon juice (d) detergent water
  8. 8.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) a white party dress (d) your school uniform
  9. 9.True or false: soap solution is a base. (a) False (b) True
  10. 10.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) white paper strips (d) a balloon
  12. 12.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  13. 13.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) lemon juice (c) soap solution (d) sugar water
  14. 14.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns green (d) it turns blue
  15. 15.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) yeast (c) a balloon (d) water
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  18. 18.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  19. 19.🫧 Which of these is an acid? (a) vinegar (b) sugar water (c) plain water (d) baking soda water
  20. 20.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the liquid we test (d) the light we look in
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  24. 24.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  25. 25.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a balloon (c) a magnet (d) a mirror
  26. 26.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) plain water
  27. 27.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a battery cell (c) turmeric powder (d) soap solution
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
  29. 29.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  30. 30.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  31. 31.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  32. 32.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) vinegar (d) sugar water
  33. 33.🫧 Which of these is a base? (a) detergent water (b) vinegar (c) orange juice (d) sugar water
  34. 34.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) white paper strips (c) a balloon (d) a magnet
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) water (d) yeast
  36. 36.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
  38. 38.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  39. 39.🫧 Which of these is an acid? (a) plain water (b) lemon juice (c) sugar water (d) soap solution
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False

Answer key

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

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