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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 655 · 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.🔮 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
  2. 2.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
  3. 3.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  4. 4.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
  5. 5.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  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.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a battery cell (c) a balloon (d) turmeric powder
  8. 8.⚖️ 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
  9. 9.True or false: plain water is an acid. (a) True (b) False
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  11. 11.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  12. 12.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) lemon juice (d) soap solution
  13. 13.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  14. 14.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  15. 15.True or false: lemon juice is a base. (a) True (b) False
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
  17. 17.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
  18. 18.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) salt water (d) plain water
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
  20. 20.True or false: vinegar is an acid. (a) False (b) True
  21. 21.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) lemon juice (d) a balloon
  23. 23.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) salt water
  24. 24.True or false: baking soda water is a base. (a) True (b) False
  25. 25.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  26. 26.🫧 Which of these is a base? (a) lemon juice (b) sugar water (c) soap solution (d) curd
  27. 27.⚖️ 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
  28. 28.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  29. 29.🫧 Which of these is neutral? (a) plain water (b) curd (c) baking soda water (d) detergent water
  30. 30.True or false: baking soda water is neutral. (a) False (b) True
  31. 31.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  33. 33.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  34. 34.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  35. 35.🫧 Which of these is an acid? (a) orange juice (b) plain water (c) soap solution (d) detergent water
  36. 36.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  37. 37.True or false: vinegar is a base. (a) False (b) True
  38. 38.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) salt water (c) detergent water (d) baking soda water
  39. 39.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) vinegar (c) soap solution (d) sugar water
  40. 40.🫧 Which of these is an acid? (a) baking soda water (b) lemon juice (c) detergent water (d) sugar water

Answer key

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

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