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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 203 · 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.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  2. 2.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  3. 3.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the number of drops
  5. 5.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) white paper strips (c) water (d) turmeric powder
  7. 7.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  8. 8.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
  10. 10.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  12. 12.True or false: lemon juice is a base. (a) True (b) False
  13. 13.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  14. 14.True or false: plain water keeps turmeric yellow. (a) False (b) True
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) a mirror (d) water
  16. 16.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns black (d) it turns red
  17. 17.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  18. 18.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  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.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  21. 21.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  22. 22.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  23. 23.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) baking soda water (d) sugar water
  24. 24.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  25. 25.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  26. 26.🫧 Which of these is a base? (a) lemon juice (b) soap solution (c) curd (d) sugar water
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the light we look in (d) the turmeric paper
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
  29. 29.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) tamarind water (c) plain water (d) detergent water
  30. 30.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) tamarind water (d) vinegar
  31. 31.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  32. 32.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  34. 34.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) your school uniform (d) a white party dress
  35. 35.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
  37. 37.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  38. 38.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  39. 39.🫧 Which of these is a base? (a) curd (b) detergent water (c) sugar water (d) plain water
  40. 40.True or false: a magnet is needed for the turmeric test. (a) True (b) False

Answer key

  1. an acid
  2. True
  3. False
  4. the colour we see
  5. stays yellow
  6. a magnet
  7. False
  8. needed
  9. we change it
  10. False
  11. False
  12. False
  13. turns reddish-brown
  14. True
  15. a mirror
  16. it stays yellow
  17. True
  18. False
  19. reddish-brown
  20. True
  21. True
  22. an acid
  23. baking soda water
  24. True
  25. needed
  26. soap solution
  27. the liquid we test
  28. False
  29. detergent water
  30. detergent water
  31. True
  32. stays yellow
  33. needed
  34. an old shirt or apron
  35. stays yellow
  36. False
  37. needed
  38. turns reddish-brown
  39. detergent water
  40. False

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