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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 304 · 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.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) reddish-brown (d) it turns blue
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) yeast (d) water
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  5. 5.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) lemon juice (c) vinegar (d) sugar water
  6. 6.True or false: lemon juice is a base. (a) True (b) False
  7. 7.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  8. 8.True or false: salt water is a base. (a) False (b) True
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the liquid we test (c) the turmeric paper (d) the colour we see
  10. 10.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
  12. 12.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  13. 13.🔍 Which is the odd one out? (a) plain water (b) soap solution (c) detergent water (d) baking soda water
  14. 14.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
  15. 15.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) green (d) bright blue
  16. 16.🧺 Which of these is not needed for the turmeric test? (a) water (b) yeast (c) turmeric powder (d) white paper strips
  17. 17.🫧 Which of these is a base? (a) orange juice (b) soap solution (c) curd (d) salt water
  18. 18.🟡 Which of these keeps turmeric yellow? (a) plain water (b) baking soda water (c) soap solution (d) detergent water
  19. 19.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) sugar water (c) baking soda water (d) soap solution
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) sugar water (c) vinegar (d) tamarind water
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
  23. 23.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  24. 24.True or false: sugar water keeps turmeric yellow. (a) False (b) True
  25. 25.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  26. 26.True or false: tamarind water is an acid. (a) False (b) True
  27. 27.🫧 Which of these is neutral? (a) tamarind water (b) vinegar (c) orange juice (d) sugar water
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) white paper strips (c) water (d) soap solution
  29. 29.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  31. 31.True or false: a balloon 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 colour we see is what we measure. (a) False (b) True
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a mirror (d) a dropper or spoon
  34. 34.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) sugar water (d) baking soda water
  35. 35.True or false: a comb is not needed for the turmeric test. (a) False (b) True
  36. 36.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  37. 37.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  38. 38.⚖️ 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
  39. 39.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  40. 40.True or false: vinegar keeps turmeric yellow. (a) False (b) True

Answer key

  1. use only kitchen items
  2. reddish-brown
  3. yeast
  4. we keep it the same
  5. soap solution
  6. False
  7. needed
  8. False
  9. the liquid we test
  10. neutral
  11. we keep it the same
  12. a base
  13. plain water
  14. an old shirt or apron
  15. reddish
  16. yeast
  17. soap solution
  18. plain water
  19. sugar water
  20. soap solution
  21. False
  22. False
  23. False
  24. True
  25. stays yellow
  26. True
  27. sugar water
  28. a battery cell
  29. an acid
  30. we measure it
  31. False
  32. True
  33. a mirror
  34. baking soda water
  35. True
  36. not needed
  37. True
  38. we change it
  39. stays yellow
  40. True

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