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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 62 · 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: lemon juice is neutral. (a) False (b) True
  2. 2.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  3. 3.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) bright blue (d) reddish-brown
  4. 4.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  5. 5.True or false: water is not needed for the turmeric test. (a) True (b) False
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the light we look in (c) the liquid we test (d) the turmeric paper
  7. 7.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
  8. 8.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) a battery cell (d) water
  10. 10.True or false: a comb is needed for the turmeric test. (a) True (b) False
  11. 11.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  12. 12.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a magnet (c) white paper strips (d) water
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
  14. 14.🫧 Which of these is neutral? (a) vinegar (b) plain water (c) curd (d) orange juice
  15. 15.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  16. 16.True or false: curd is an acid. (a) False (b) True
  17. 17.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
  18. 18.True or false: detergent water is an acid. (a) False (b) True
  19. 19.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) water (c) a battery cell (d) a comb
  20. 20.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  21. 21.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  22. 22.🫧 Which of these is an acid? (a) plain water (b) sugar water (c) soap solution (d) vinegar
  23. 23.🫧 Which of these is neutral? (a) orange juice (b) lemon juice (c) salt water (d) curd
  24. 24.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) a mirror (d) a dropper or spoon
  25. 25.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  26. 26.True or false: soap solution is a base. (a) False (b) True
  27. 27.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  28. 28.True or false: tamarind water is neutral. (a) True (b) False
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  30. 30.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) sniff each bottle hard (d) use only kitchen items
  31. 31.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  32. 32.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  33. 33.True or false: vinegar is an acid. (a) False (b) True
  34. 34.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) lemon juice (d) a magnet
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the number of drops (c) the colour we see
  38. 38.True or false: sugar water is an acid. (a) False (b) True
  39. 39.⚖️ 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
  40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) a dropper or spoon (d) soap solution

Answer key

  1. False
  2. True
  3. reddish-brown
  4. a base
  5. False
  6. the liquid we test
  7. an old shirt or apron
  8. True
  9. a battery cell
  10. False
  11. stays yellow
  12. a magnet
  13. the turmeric paper
  14. plain water
  15. an acid
  16. True
  17. lemon juice
  18. False
  19. water
  20. stays yellow
  21. turns reddish-brown
  22. vinegar
  23. salt water
  24. a dropper or spoon
  25. False
  26. True
  27. needed
  28. False
  29. False
  30. use only kitchen items
  31. an acid
  32. False
  33. True
  34. needed
  35. a magnet
  36. we keep it the same
  37. the number of drops
  38. False
  39. False
  40. a balloon

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