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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 51 · 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? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) soap solution (c) turmeric powder (d) a dropper or spoon
  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.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
  5. 5.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  6. 6.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
  7. 7.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  8. 8.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a balloon (c) a dropper or spoon (d) water
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) a magnet (d) turmeric powder
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) a comb (d) soap solution
  11. 11.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  12. 12.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns darker red (c) it turns blue (d) it turns yellow again
  13. 13.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  14. 14.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) tamarind water (c) baking soda water (d) sugar water
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the turmeric paper (d) the liquid we test
  16. 16.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  17. 17.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) soap solution (c) turmeric powder (d) water
  19. 19.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  20. 20.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a battery cell (c) yeast (d) a dropper or spoon
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  22. 22.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  23. 23.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) your best clothes (d) a white party dress
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  25. 25.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) turmeric powder (d) a mirror
  27. 27.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  28. 28.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  29. 29.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) lemon juice (c) soap solution (d) water
  30. 30.True or false: detergent water is a base. (a) False (b) True
  31. 31.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  32. 32.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) white paper strips (d) a battery cell
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
  35. 35.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) lemon juice (d) sugar water
  36. 36.True or false: curd is a base. (a) False (b) True
  37. 37.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  38. 38.True or false: yeast is needed for the turmeric test. (a) False (b) True
  39. 39.🔍 Which is the odd one out? (a) tamarind water (b) salt water (c) soap solution (d) sugar water
  40. 40.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid

Answer key

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

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