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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 540 · 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.⚖️ 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 liquid we test (c) the light we look in (d) the turmeric paper
  2. 2.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
  4. 4.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) soap solution (d) a balloon
  6. 6.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) vinegar (c) sugar water (d) soap solution
  7. 7.True or false: plain water keeps turmeric yellow. (a) False (b) True
  8. 8.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  9. 9.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) vinegar (d) soap solution
  10. 10.🛟 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
  11. 11.True or false: water is not needed for the turmeric test. (a) False (b) True
  12. 12.🔮 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) reddish (d) green
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  15. 15.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) plain water (d) detergent water
  16. 16.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  18. 18.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) tamarind water (d) soap solution
  19. 19.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  20. 20.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  21. 21.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) white paper strips (d) yeast
  22. 22.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) a magnet (d) water
  23. 23.True or false: curd is neutral. (a) False (b) True
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
  25. 25.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
  26. 26.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  27. 27.True or false: vinegar is an acid. (a) False (b) True
  28. 28.🫧 Which of these is neutral? (a) sugar water (b) baking soda water (c) vinegar (d) detergent water
  29. 29.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  30. 30.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) vinegar (c) detergent water (d) lemon juice
  31. 31.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) bright blue (c) green (d) reddish-brown
  32. 32.⚖️ 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
  33. 33.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) lemon juice (c) baking soda water (d) detergent water
  34. 34.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  35. 35.True or false: soap solution is a base. (a) False (b) True
  36. 36.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  37. 37.True or false: detergent water is an acid. (a) True (b) False
  38. 38.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a mirror (c) a battery cell (d) a balloon
  39. 39.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  40. 40.True or false: tamarind water keeps turmeric yellow. (a) False (b) True

Answer key

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

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