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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 937 · 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: lemon juice is a base. (a) False (b) True
  2. 2.True or false: salt water is an acid. (a) False (b) True
  3. 3.⚖️ 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 measure it (c) we change it
  4. 4.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
  5. 5.True or false: tamarind water is an acid. (a) False (b) True
  6. 6.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
  8. 8.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water
  9. 9.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is an acid (c) soap water is a base (d) soap is magnetic
  10. 10.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  11. 11.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) tamarind water (d) detergent water
  12. 12.🧺 Which of these is needed for the turmeric test? (a) water (b) a magnet (c) yeast (d) a mirror
  13. 13.True or false: orange juice is neutral. (a) False (b) True
  14. 14.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  15. 15.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) an indicator (d) a prism
  16. 16.True or false: detergent water is an acid. (a) False (b) True
  17. 17.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  19. 19.⚖️ 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
  20. 20.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  21. 21.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) lemon juice (c) plain water (d) baking soda water
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a magnet (c) lemon juice (d) water
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
  24. 24.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) sugar water (d) soap solution
  25. 25.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a mirror (c) a balloon (d) a magnet
  26. 26.🫧 Which of these is neutral? (a) lemon juice (b) plain water (c) curd (d) soap solution
  27. 27.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  28. 28.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  29. 29.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) white paper strips (c) lemon juice (d) yeast
  30. 30.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  31. 31.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) plain water (d) soap solution
  32. 32.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  33. 33.True or false: vinegar is an acid. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
  35. 35.🫧 Which of these is neutral? (a) sugar water (b) vinegar (c) lemon juice (d) soap solution
  36. 36.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) tamarind water (c) baking soda water (d) detergent water
  37. 37.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) sugar water (d) vinegar
  38. 38.True or false: tamarind water is neutral. (a) True (b) False
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) water (d) a mirror
  40. 40.True or false: salt water turns turmeric reddish-brown. (a) False (b) True

Answer key

  1. False
  2. False
  3. we keep it the same
  4. use only kitchen items
  5. True
  6. False
  7. we change it
  8. vinegar
  9. soap water is a base
  10. not needed
  11. detergent water
  12. water
  13. False
  14. False
  15. an indicator
  16. False
  17. stays yellow
  18. True
  19. the light we look in
  20. a base
  21. baking soda water
  22. a magnet
  23. we keep it the same
  24. soap solution
  25. turmeric powder
  26. plain water
  27. needed
  28. neutral
  29. yeast
  30. needed
  31. plain water
  32. not needed
  33. True
  34. sugar water
  35. sugar water
  36. tamarind water
  37. detergent water
  38. False
  39. a mirror
  40. False

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