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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 847 · 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 not needed for the turmeric test. (a) False (b) True
  2. 2.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
  3. 3.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  5. 5.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a mirror (c) lemon juice (d) a comb
  6. 6.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) plain water (d) baking soda water
  7. 7.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) a dropper or spoon (d) a comb
  8. 8.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  9. 9.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
  10. 10.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it disappears (d) it turns blue
  11. 11.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  12. 12.🫧 Which of these is a base? (a) tamarind water (b) baking soda water (c) sugar water (d) curd
  13. 13.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
  14. 14.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) detergent water (d) baking soda water
  15. 15.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  16. 16.🫧 Which of these is an acid? (a) salt water (b) lemon juice (c) sugar water (d) soap solution
  17. 17.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  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.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) plain water (d) soap solution
  20. 20.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  21. 21.True or false: detergent water is a base. (a) False (b) True
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) white paper strips (d) soap solution
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) water (c) lemon juice (d) soap solution
  24. 24.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap water is a base (d) soap is hot
  25. 25.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  26. 26.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  27. 27.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  28. 28.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  29. 29.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  30. 30.True or false: tamarind water is an acid. (a) True (b) False
  31. 31.True or false: plain water is an acid. (a) False (b) True
  32. 32.True or false: plain water is neutral. (a) False (b) True
  33. 33.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) lemon juice (d) detergent water
  34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) a mirror (d) soap solution
  35. 35.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
  37. 37.🫧 Which of these is neutral? (a) orange juice (b) lemon juice (c) detergent water (d) plain water
  38. 38.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  39. 39.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) sugar water
  40. 40.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) detergent water (c) lemon juice (d) salt water

Answer key

  1. False
  2. an old shirt or apron
  3. False
  4. we keep it the same
  5. lemon juice
  6. plain water
  7. a comb
  8. a base
  9. reddish
  10. it turns yellow again
  11. True
  12. baking soda water
  13. it stays yellow
  14. plain water
  15. True
  16. lemon juice
  17. neutral
  18. False
  19. soap solution
  20. turns reddish-brown
  21. True
  22. a magnet
  23. a comb
  24. soap water is a base
  25. not needed
  26. True
  27. False
  28. reddish-brown
  29. needed
  30. True
  31. False
  32. True
  33. lemon juice
  34. a mirror
  35. True
  36. False
  37. plain water
  38. True
  39. sugar water
  40. detergent water

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