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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 998 · 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: sugar water is neutral. (a) True (b) False
  2. 2.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  3. 3.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your best clothes (d) your school uniform
  4. 4.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) soap solution (d) a balloon
  6. 6.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  7. 7.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it stays yellow (c) it turns black (d) it turns red
  8. 8.🫧 Which of these is an acid? (a) salt water (b) detergent water (c) soap solution (d) curd
  9. 9.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
  10. 10.🫧 Which of these is a base? (a) plain water (b) vinegar (c) sugar water (d) detergent water
  11. 11.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  12. 12.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  13. 13.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  14. 14.⚖️ 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
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  16. 16.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  17. 17.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a magnet (c) a dropper or spoon (d) a battery cell
  18. 18.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) salt water (d) detergent water
  19. 19.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  20. 20.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) vinegar (c) soap solution (d) sugar water
  21. 21.True or false: plain water keeps turmeric yellow. (a) True (b) False
  22. 22.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  23. 23.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  24. 24.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) tamarind water (c) soap solution (d) sugar water
  25. 25.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  26. 26.⚖️ 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 number of drops (c) the turmeric paper (d) the liquid we test
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  28. 28.🫧 Which of these is a base? (a) lemon juice (b) tamarind water (c) baking soda water (d) salt water
  29. 29.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  30. 30.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  31. 31.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
  32. 32.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  33. 33.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) white paper strips (c) a magnet (d) a mirror
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) water (d) a balloon
  35. 35.⚖️ 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
  36. 36.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap water is a base (d) soap is an acid
  37. 37.True or false: tamarind water is a base. (a) False (b) True
  38. 38.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  39. 39.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) vinegar (d) lemon juice
  40. 40.True or false: water is not needed for the turmeric test. (a) False (b) True

Answer key

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

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