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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 340 · 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 comb for the turmeric test? (a) needed (b) not needed
  2. 2.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  3. 3.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a balloon (c) a comb (d) a magnet
  4. 4.🔍 Which is the odd one out? (a) vinegar (b) salt water (c) soap solution (d) lemon juice
  5. 5.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  6. 6.⚖️ 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
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) lemon juice (d) a magnet
  8. 8.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  9. 9.🟡 Which of these keeps turmeric yellow? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
  10. 10.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  11. 11.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns blue (d) it turns green
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  13. 13.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  14. 14.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) white paper strips (c) a dropper or spoon (d) turmeric powder
  15. 15.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  16. 16.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns blue (d) it turns yellow again
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
  18. 18.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is hot (d) soap is magnetic
  19. 19.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) bright blue (d) green
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) plain water (c) baking soda water (d) salt water
  21. 21.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  22. 22.🫧 Which of these is neutral? (a) tamarind water (b) orange juice (c) plain water (d) detergent water
  23. 23.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) vinegar (d) tamarind water
  24. 24.🫧 Which of these is a base? (a) tamarind water (b) vinegar (c) curd (d) baking soda water
  25. 25.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) soap solution (c) vinegar (d) sugar water
  26. 26.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
  27. 27.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  28. 28.True or false: plain water is a base. (a) True (b) False
  29. 29.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  31. 31.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  32. 32.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) detergent water (c) vinegar (d) salt water
  33. 33.True or false: sugar water is neutral. (a) False (b) True
  34. 34.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) white paper strips (d) a battery cell
  35. 35.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  36. 36.True or false: orange juice is a base. (a) True (b) False
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
  38. 38.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  39. 39.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it

Answer key

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

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