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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 345 · 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: soap solution is needed for the turmeric test. (a) True (b) False
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) a dropper or spoon (c) white paper strips (d) lemon juice
  3. 3.True or false: baking soda water is an acid. (a) True (b) False
  4. 4.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  5. 5.🔍 Which is the odd one out? (a) tamarind water (b) salt water (c) lemon juice (d) baking soda water
  6. 6.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the light we look in (c) the liquid we test (d) the colour we see
  10. 10.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) lemon juice (c) soap solution (d) detergent water
  11. 11.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a magnet (c) soap solution (d) turmeric powder
  13. 13.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) bright blue (d) it stays white
  14. 14.🔍 Which is the odd one out? (a) sugar water (b) tamarind water (c) soap solution (d) vinegar
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a mirror (c) a dropper or spoon (d) turmeric powder
  16. 16.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  17. 17.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a comb (c) a mirror (d) a magnet
  18. 18.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a comb (c) white paper strips (d) soap solution
  20. 20.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) plain water (d) soap solution
  21. 21.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
  22. 22.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) soap solution (c) sugar water (d) vinegar
  23. 23.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  24. 24.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  25. 25.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) white paper strips (c) a dropper or spoon (d) turmeric powder
  26. 26.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) a magnet (d) an indicator
  27. 27.True or false: plain water is an acid. (a) False (b) True
  28. 28.🫧 Which of these is an acid? (a) lemon juice (b) salt water (c) baking soda water (d) soap solution
  29. 29.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  30. 30.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) tamarind water (c) lemon juice (d) detergent water
  31. 31.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  32. 32.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) water (d) yeast
  34. 34.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) detergent water (d) baking soda water
  35. 35.True or false: vinegar is an acid. (a) False (b) True
  36. 36.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
  38. 38.True or false: yeast is needed for the turmeric test. (a) False (b) True
  39. 39.True or false: baking soda water is neutral. (a) False (b) True
  40. 40.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral

Answer key

  1. True
  2. a balloon
  3. False
  4. needed
  5. baking soda water
  6. False
  7. False
  8. we measure it
  9. the colour we see
  10. lemon juice
  11. False
  12. a magnet
  13. reddish-brown
  14. soap solution
  15. a mirror
  16. True
  17. white paper strips
  18. False
  19. a comb
  20. plain water
  21. it turns yellow again
  22. soap solution
  23. needed
  24. needed
  25. a magnet
  26. an indicator
  27. False
  28. lemon juice
  29. True
  30. detergent water
  31. needed
  32. turns reddish-brown
  33. yeast
  34. tamarind water
  35. True
  36. a base
  37. we keep it the same
  38. False
  39. False
  40. an acid

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