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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 114 · 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.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) tamarind water (d) baking soda water
  2. 2.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  3. 3.True or false: tamarind water is an acid. (a) True (b) False
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  5. 5.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) white paper strips (c) yeast (d) turmeric powder
  6. 6.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) an old shirt or apron (d) your school uniform
  7. 7.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) a mirror (d) lemon juice
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) yeast (d) a dropper or spoon
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) a comb (d) turmeric powder
  10. 10.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  11. 11.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  12. 12.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
  13. 13.True or false: soap solution is a base. (a) True (b) False
  14. 14.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  15. 15.True or false: sugar water is an acid. (a) True (b) False
  16. 16.True or false: a comb is needed for the turmeric test. (a) True (b) False
  17. 17.True or false: salt water is neutral. (a) True (b) False
  18. 18.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution
  19. 19.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns darker red (d) it turns yellow again
  20. 20.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  21. 21.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  22. 22.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) turmeric powder (d) a magnet
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) a battery cell (d) water
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  25. 25.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  26. 26.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  27. 27.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  28. 28.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  29. 29.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) a dropper or spoon (d) a mirror
  31. 31.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  33. 33.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  34. 34.True or false: plain water keeps turmeric yellow. (a) False (b) True
  35. 35.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) sugar water
  36. 36.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish
  37. 37.True or false: water is needed for the turmeric test. (a) True (b) False
  38. 38.🔍 Which is the odd one out? (a) vinegar (b) detergent water (c) soap solution (d) baking soda water
  39. 39.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the colour we see (c) the light we look in (d) the liquid we test

Answer key

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

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