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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 288 · 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.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.⚖️ 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
  3. 3.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) tamarind water (c) detergent water (d) lemon juice
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the light we look in
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
  6. 6.⚖️ 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
  7. 7.🔮 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
  8. 8.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  9. 9.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a magnet (c) a comb (d) yeast
  10. 10.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is an acid (d) soap is hot
  11. 11.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) lemon juice (d) a battery cell
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a comb (c) lemon juice (d) turmeric powder
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) soap solution (d) yeast
  14. 14.True or false: orange juice is a base. (a) False (b) True
  15. 15.🫧 Which of these is neutral? (a) baking soda water (b) tamarind water (c) detergent water (d) salt water
  16. 16.🫧 Which of these is an acid? (a) lemon juice (b) soap solution (c) detergent water (d) plain water
  17. 17.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
  18. 18.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  19. 19.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  20. 20.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  21. 21.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  22. 22.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) lemon juice (c) water (d) a dropper or spoon
  25. 25.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) vinegar
  26. 26.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  27. 27.True or false: detergent water is neutral. (a) False (b) True
  28. 28.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  29. 29.⚖️ 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
  30. 30.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  32. 32.True or false: a comb is needed for the turmeric test. (a) True (b) False
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the number of drops (c) the colour we see (d) the light we look in
  34. 34.True or false: soap solution is a base. (a) True (b) False
  35. 35.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  36. 36.🫧 Which of these is a base? (a) salt water (b) orange juice (c) curd (d) baking soda water
  37. 37.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  38. 38.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) plain water
  39. 39.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  40. 40.🔍 Which is the odd one out? (a) salt water (b) tamarind water (c) detergent water (d) lemon juice

Answer key

  1. stays yellow
  2. False
  3. detergent water
  4. the liquid we test
  5. we keep it the same
  6. we keep it the same
  7. reddish
  8. needed
  9. turmeric powder
  10. soap water is a base
  11. lemon juice
  12. a comb
  13. yeast
  14. False
  15. salt water
  16. lemon juice
  17. it stays yellow
  18. True
  19. False
  20. False
  21. False
  22. an acid
  23. we keep it the same
  24. a magnet
  25. vinegar
  26. True
  27. False
  28. False
  29. we measure it
  30. False
  31. True
  32. False
  33. the colour we see
  34. True
  35. False
  36. baking soda water
  37. not needed
  38. plain water
  39. a base
  40. detergent water

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