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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 116 · 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.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) salt water (d) lemon juice
  2. 2.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  3. 3.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) detergent water (d) soap solution
  4. 4.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap is magnetic (d) soap water is a base
  5. 5.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  6. 6.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  7. 7.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  8. 8.🫧 Which of these is an acid? (a) baking soda water (b) tamarind water (c) detergent water (d) soap solution
  9. 9.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  10. 10.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
  11. 11.True or false: salt water is neutral. (a) True (b) False
  12. 12.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  13. 13.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) soap solution (d) yeast
  14. 14.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
  15. 15.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) a battery cell (d) a dropper or spoon
  17. 17.🧺 Which of these is needed for the turmeric test? (a) a comb (b) white paper strips (c) a magnet (d) a battery cell
  18. 18.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  19. 19.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) lemon juice (c) vinegar (d) sugar water
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) plain water (c) salt water (d) baking soda water
  21. 21.🫧 Which of these is a base? (a) detergent water (b) salt water (c) sugar water (d) curd
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  23. 23.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  24. 24.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  26. 26.⚖️ 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 measure it (c) we change it
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  28. 28.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns darker red (d) it turns blue
  29. 29.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
  30. 30.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a dropper or spoon (c) turmeric powder (d) a mirror
  31. 31.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  32. 32.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  33. 33.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  34. 34.⚖️ 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
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) white paper strips (c) soap solution (d) turmeric powder
  37. 37.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  38. 38.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  39. 39.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  40. 40.🔍 Which is the odd one out? (a) soap solution (b) vinegar (c) baking soda water (d) detergent water

Answer key

  1. baking soda water
  2. a base
  3. lemon juice
  4. soap water is a base
  5. True
  6. a base
  7. stays yellow
  8. tamarind water
  9. an acid
  10. reddish-brown
  11. True
  12. needed
  13. soap solution
  14. sugar water
  15. True
  16. a battery cell
  17. white paper strips
  18. True
  19. soap solution
  20. baking soda water
  21. detergent water
  22. we keep it the same
  23. False
  24. an acid
  25. True
  26. we keep it the same
  27. True
  28. it turns yellow again
  29. an old shirt or apron
  30. a mirror
  31. neutral
  32. True
  33. True
  34. we keep it the same
  35. False
  36. yeast
  37. a base
  38. False
  39. True
  40. vinegar

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