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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 735 · 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: water is not needed for the turmeric test. (a) True (b) False
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) water (b) a magnet (c) white paper strips (d) lemon juice
  3. 3.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  4. 4.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  5. 5.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  6. 6.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  7. 7.⚖️ 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
  8. 8.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  9. 9.True or false: a comb is not needed for the turmeric test. (a) False (b) True
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) yeast (d) white paper strips
  11. 11.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  12. 12.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) lemon juice (c) a dropper or spoon (d) white paper strips
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) white paper strips (c) water (d) a dropper or spoon
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  15. 15.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
  16. 16.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a magnet (c) a mirror (d) a balloon
  17. 17.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) salt water (d) soap solution
  18. 18.🫧 Which of these is an acid? (a) plain water (b) lemon juice (c) soap solution (d) sugar water
  19. 19.🫧 Which of these is a base? (a) vinegar (b) sugar water (c) baking soda water (d) orange juice
  20. 20.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  21. 21.True or false: tamarind water is a base. (a) True (b) False
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) a comb (d) water
  23. 23.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
  24. 24.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  25. 25.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) plain water (d) baking soda water
  26. 26.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  27. 27.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the number of drops (c) the turmeric paper (d) the liquid we test
  29. 29.⚖️ 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
  30. 30.🔍 Which is the odd one out? (a) baking soda water (b) tamarind water (c) soap solution (d) detergent water
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
  32. 32.⚖️ 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 light we look in
  33. 33.True or false: baking soda water is an acid. (a) False (b) True
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) turmeric powder (c) soap solution (d) lemon juice
  35. 35.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  36. 36.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) reddish-brown (d) green
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) a mirror (d) white paper strips
  38. 38.⚖️ 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
  39. 39.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) yeast (c) lemon juice (d) white paper strips

Answer key

  1. False
  2. a magnet
  3. stays yellow
  4. False
  5. a base
  6. True
  7. we change it
  8. False
  9. True
  10. yeast
  11. False
  12. a comb
  13. a battery cell
  14. we measure it
  15. reddish
  16. turmeric powder
  17. salt water
  18. lemon juice
  19. baking soda water
  20. False
  21. False
  22. a comb
  23. it stays yellow
  24. needed
  25. baking soda water
  26. needed
  27. needed
  28. the liquid we test
  29. True
  30. tamarind water
  31. we keep it the same
  32. the light we look in
  33. False
  34. a battery cell
  35. False
  36. reddish-brown
  37. a mirror
  38. we keep it the same
  39. needed
  40. yeast

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