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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 348 · 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: a magnet is not needed for the turmeric test. (a) True (b) False
  2. 2.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  3. 3.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
  5. 5.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  6. 6.🫧 Which of these is an acid? (a) vinegar (b) sugar water (c) detergent water (d) plain water
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) a mirror (d) lemon juice
  8. 8.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) bright blue (d) white at once
  9. 9.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  10. 10.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
  11. 11.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  12. 12.🫧 Which of these is an acid? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the number of drops (c) the turmeric paper (d) the liquid we test
  14. 14.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  15. 15.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.True or false: baking soda water is neutral. (a) False (b) True
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the light we look in (c) the liquid we test (d) the colour we see
  18. 18.🫧 Which of these is an acid? (a) tamarind water (b) baking soda water (c) soap solution (d) plain water
  19. 19.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) soap solution (c) vinegar (d) lemon juice
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
  21. 21.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) lemon juice (d) baking soda water
  22. 22.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) yeast (d) water
  23. 23.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) a comb (d) turmeric powder
  24. 24.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) your school uniform (d) a white party dress
  25. 25.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a magnet (d) a prism
  26. 26.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  27. 27.⚖️ 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
  28. 28.True or false: curd is an acid. (a) False (b) True
  29. 29.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  30. 30.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) a magnet (d) white paper strips
  31. 31.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) yeast (d) a mirror
  32. 32.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) vinegar (d) baking soda water
  33. 33.🔍 Which is the odd one out? (a) plain water (b) salt water (c) lemon juice (d) soap solution
  34. 34.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) reddish-brown (d) green
  35. 35.True or false: water is not needed for the turmeric test. (a) True (b) False
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
  37. 37.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a balloon (d) a dropper or spoon
  39. 39.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  40. 40.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown

Answer key

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

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