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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 291 · 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.

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

Answer key

  1. not needed
  2. needed
  3. the colour we see
  4. we measure it
  5. True
  6. False
  7. False
  8. an acid
  9. needed
  10. we change it
  11. we keep it the same
  12. True
  13. yeast
  14. salt water
  15. True
  16. needed
  17. reddish
  18. False
  19. False
  20. white paper strips
  21. sugar water
  22. turns reddish-brown
  23. the light we look in
  24. plain water
  25. detergent water
  26. vinegar
  27. sugar water
  28. False
  29. we keep it the same
  30. True
  31. tamarind water
  32. the number of drops
  33. False
  34. True
  35. False
  36. soap solution
  37. a magnet
  38. a base
  39. soap solution
  40. an old shirt or apron

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