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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 945 · 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.True or false: orange juice is an acid. (a) True (b) False
  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.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) vinegar (c) salt water (d) sugar water
  4. 4.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  5. 5.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  6. 6.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  7. 7.🫧 Which of these is a base? (a) curd (b) tamarind water (c) baking soda water (d) plain water
  8. 8.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) yeast (c) a battery cell (d) a dropper or spoon
  9. 9.🫧 Which of these is a base? (a) tamarind water (b) detergent water (c) vinegar (d) plain water
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) a magnet (d) water
  11. 11.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) use only kitchen items (d) sniff each bottle hard
  12. 12.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  13. 13.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) lemon juice (d) soap solution
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  15. 15.True or false: vinegar is a base. (a) True (b) False
  16. 16.True or false: curd is neutral. (a) False (b) True
  17. 17.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) turmeric powder (c) a balloon (d) a magnet
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the number of drops (c) the liquid we test (d) the colour we see
  20. 20.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  21. 21.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  23. 23.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  24. 24.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  25. 25.⚖️ 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
  26. 26.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  27. 27.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  28. 28.True or false: plain water keeps turmeric yellow. (a) True (b) False
  29. 29.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) lemon juice (c) soap solution (d) water
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the liquid we test (d) the number of drops
  31. 31.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) turmeric powder (c) a mirror (d) water
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  33. 33.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  34. 34.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  35. 35.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) white paper strips (d) a battery cell
  36. 36.🔍 Which is the odd one out? (a) plain water (b) soap solution (c) vinegar (d) lemon juice
  37. 37.True or false: a comb is needed for the turmeric test. (a) True (b) False
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  39. 39.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  40. 40.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base

Answer key

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

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