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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 985 · 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.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  2. 2.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  4. 4.True or false: orange juice is an acid. (a) False (b) True
  5. 5.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) tamarind water
  6. 6.True or false: vinegar is an acid. (a) True (b) False
  7. 7.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  8. 8.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  9. 9.True or false: curd is a base. (a) False (b) True
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) turmeric powder (d) lemon juice
  11. 11.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) lemon juice (d) detergent water
  12. 12.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  13. 13.⚖️ 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
  14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) white paper strips (d) a comb
  15. 15.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) a mirror (d) soap solution
  19. 19.True or false: water is needed for the turmeric test. (a) False (b) True
  20. 20.🔍 Which is the odd one out? (a) sugar water (b) baking soda water (c) lemon juice (d) salt water
  21. 21.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
  22. 22.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  23. 23.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  24. 24.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) white paper strips (c) lemon juice (d) yeast
  25. 25.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a magnet (c) a dropper or spoon (d) a balloon
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) white paper strips (d) a battery cell
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  28. 28.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it stays yellow (d) it turns green
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the colour we see (c) the liquid we test (d) the number of drops
  30. 30.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  31. 31.True or false: a comb is needed for the turmeric test. (a) True (b) False
  32. 32.True or false: a dropper or spoon 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 liquid we test (b) the colour we see (c) the light we look in (d) the number of drops
  34. 34.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) soap solution (d) baking soda water
  35. 35.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  36. 36.True or false: soap solution is an acid. (a) False (b) True
  37. 37.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  38. 38.🫧 Which of these is a base? (a) detergent water (b) curd (c) tamarind water (d) orange juice
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) soap solution (c) lemon juice (d) turmeric powder
  40. 40.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) soap solution (d) a balloon

Answer key

  1. needed
  2. soap solution
  3. True
  4. True
  5. tamarind water
  6. True
  7. stays yellow
  8. False
  9. False
  10. a magnet
  11. lemon juice
  12. an acid
  13. we change it
  14. a comb
  15. turns reddish-brown
  16. False
  17. we measure it
  18. a mirror
  19. True
  20. baking soda water
  21. it stays yellow
  22. not needed
  23. needed
  24. yeast
  25. a dropper or spoon
  26. a battery cell
  27. False
  28. reddish-brown
  29. the liquid we test
  30. turns reddish-brown
  31. False
  32. True
  33. the colour we see
  34. tamarind water
  35. False
  36. False
  37. needed
  38. detergent water
  39. yeast
  40. soap solution

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