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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 672 · 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 turmeric paper (b) the number of drops (c) the light we look in (d) the liquid we test
  2. 2.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  3. 3.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) plain water (d) salt water
  4. 4.True or false: tamarind water is an acid. (a) False (b) True
  5. 5.🫧 Which of these is an acid? (a) salt water (b) plain water (c) baking soda water (d) curd
  6. 6.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
  7. 7.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) water (d) a mirror
  8. 8.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  9. 9.True or false: salt water is neutral. (a) True (b) False
  10. 10.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  11. 11.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) vinegar (d) soap solution
  12. 12.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
  13. 13.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a magnet (c) a dropper or spoon (d) lemon juice
  14. 14.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) tamarind water (c) vinegar (d) lemon juice
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) white paper strips (c) a dropper or spoon (d) turmeric powder
  16. 16.🫧 Which of these is neutral? (a) tamarind water (b) orange juice (c) curd (d) plain water
  17. 17.🫧 Which of these is an acid? (a) sugar water (b) lemon juice (c) detergent water (d) soap solution
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the turmeric paper (c) the light we look in (d) the number of drops
  21. 21.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
  22. 22.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  23. 23.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) yeast (c) a balloon (d) a magnet
  24. 24.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) plain water
  25. 25.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  26. 26.True or false: soap solution is an acid. (a) True (b) False
  27. 27.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  29. 29.⚖️ 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
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  31. 31.True or false: baking soda water is a base. (a) True (b) False
  32. 32.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns black (d) it turns red
  33. 33.True or false: plain water is a base. (a) True (b) False
  34. 34.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
  35. 35.🫧 Which of these is an acid? (a) salt water (b) soap solution (c) detergent water (d) vinegar
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) a magnet (d) lemon juice
  37. 37.True or false: salt water is an acid. (a) True (b) False
  38. 38.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) yeast (c) a mirror (d) turmeric powder
  39. 39.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  40. 40.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) baking soda water (d) sugar water

Answer key

  1. the liquid we test
  2. True
  3. detergent water
  4. True
  5. curd
  6. it stays yellow
  7. a mirror
  8. needed
  9. True
  10. False
  11. soap solution
  12. an old shirt or apron
  13. a magnet
  14. detergent water
  15. yeast
  16. plain water
  17. lemon juice
  18. the turmeric paper
  19. False
  20. the colour we see
  21. reddish-brown
  22. False
  23. soap solution
  24. plain water
  25. turns reddish-brown
  26. False
  27. True
  28. True
  29. True
  30. False
  31. True
  32. it stays yellow
  33. False
  34. reddish
  35. vinegar
  36. a magnet
  37. False
  38. turmeric powder
  39. True
  40. baking soda water

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