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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 135 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the colour we see (d) the number of drops
  2. 2.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  3. 3.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) lemon juice (c) sugar water (d) tamarind water
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  5. 5.⚖️ 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
  6. 6.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sniff each bottle hard (d) sip each liquid
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the number of drops (d) the turmeric paper
  8. 8.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  9. 9.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
  10. 10.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) plain water
  11. 11.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  12. 12.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  13. 13.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) your school uniform (d) an old shirt or apron
  14. 14.🟡 Which of these keeps turmeric yellow? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
  15. 15.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) plain water (d) lemon juice
  16. 16.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  17. 17.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) soap solution (d) baking soda water
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) turmeric powder (d) a magnet
  19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns red (d) it turns black
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) detergent water (c) salt water (d) tamarind water
  21. 21.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  22. 22.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  23. 23.True or false: a comb is needed for the turmeric test. (a) False (b) True
  24. 24.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) white paper strips (c) a dropper or spoon (d) a magnet
  25. 25.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  26. 26.True or false: vinegar is an acid. (a) True (b) False
  27. 27.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) salt water (c) tamarind water (d) baking soda water
  28. 28.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  29. 29.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  30. 30.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) bright blue (d) it stays white
  31. 31.True or false: soap solution is a base. (a) False (b) True
  32. 32.True or false: plain water keeps turmeric yellow. (a) False (b) True
  33. 33.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  34. 34.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  35. 35.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a mirror (c) yeast (d) soap solution
  36. 36.🫧 Which of these is neutral? (a) salt water (b) vinegar (c) tamarind water (d) curd
  37. 37.True or false: soap solution is an acid. (a) True (b) False
  38. 38.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) lemon juice (d) a balloon
  39. 39.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  40. 40.True or false: water is not needed for the turmeric test. (a) True (b) False

Answer key

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

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