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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 180 · 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.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  2. 2.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  3. 3.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) vinegar (d) baking soda water
  4. 4.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  5. 5.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) white paper strips (c) lemon juice (d) turmeric powder
  7. 7.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) tamarind water (c) salt water (d) lemon juice
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the light we look in (c) the number of drops (d) the turmeric paper
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) a mirror (d) turmeric powder
  10. 10.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) bright blue (c) reddish-brown (d) it stays white
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the number of drops (d) the colour we see
  12. 12.⚖️ 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
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) a magnet (d) lemon juice
  15. 15.🫧 Which of these is neutral? (a) orange juice (b) tamarind water (c) soap solution (d) sugar water
  16. 16.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  17. 17.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  18. 18.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) vinegar (d) plain water
  19. 19.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) lemon juice (d) soap solution
  20. 20.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  21. 21.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a battery cell (c) water (d) yeast
  22. 22.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  23. 23.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  24. 24.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a magnet (c) turmeric powder (d) water
  25. 25.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  26. 26.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  27. 27.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
  28. 28.🫧 Which of these is a base? (a) baking soda water (b) plain water (c) vinegar (d) salt water
  29. 29.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  30. 30.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) water (c) a dropper or spoon (d) lemon juice
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a battery cell (c) soap solution (d) lemon juice
  34. 34.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  35. 35.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  36. 36.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  37. 37.True or false: plain water keeps turmeric yellow. (a) True (b) False
  38. 38.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  39. 39.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  40. 40.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns darker red (d) it turns blue

Answer key

  1. not needed
  2. not needed
  3. baking soda water
  4. a base
  5. it stays yellow
  6. a mirror
  7. soap solution
  8. the liquid we test
  9. a mirror
  10. reddish-brown
  11. the colour we see
  12. we keep it the same
  13. True
  14. a magnet
  15. sugar water
  16. not needed
  17. False
  18. vinegar
  19. soap solution
  20. stays yellow
  21. water
  22. neutral
  23. True
  24. a magnet
  25. needed
  26. turns reddish-brown
  27. reddish
  28. baking soda water
  29. needed
  30. True
  31. yeast
  32. False
  33. a battery cell
  34. False
  35. needed
  36. it stays yellow
  37. True
  38. stays yellow
  39. False
  40. it turns yellow again

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