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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 279 · 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.

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  1. 1.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) yeast (d) turmeric powder
  2. 2.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  3. 3.🫧 Which of these is a base? (a) tamarind water (b) soap solution (c) curd (d) orange juice
  4. 4.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
  5. 5.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  6. 6.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  7. 7.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  8. 8.⚖️ 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 change it (c) we keep it the same
  9. 9.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  10. 10.🛟 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
  11. 11.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  12. 12.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a battery cell (c) a comb (d) white paper strips
  13. 13.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is an acid (d) soap is magnetic
  14. 14.🫧 Which of these is neutral? (a) lemon juice (b) sugar water (c) soap solution (d) baking soda water
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
  17. 17.🫧 Which of these is an acid? (a) orange juice (b) detergent water (c) soap solution (d) baking soda water
  18. 18.🔮 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
  19. 19.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  20. 20.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  21. 21.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) a comb (d) water
  22. 22.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
  23. 23.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
  24. 24.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns yellow again (d) it turns blue
  25. 25.🟡 Turmeric paper meets salt 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) soap solution (b) white paper strips (c) a dropper or spoon (d) a balloon
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the number of drops (d) the light we look in
  28. 28.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  29. 29.True or false: sugar water is neutral. (a) True (b) False
  30. 30.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) lemon juice (d) a magnet
  31. 31.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a comb (c) a balloon (d) a dropper or spoon
  32. 32.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  33. 33.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) water (c) white paper strips (d) a mirror
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  36. 36.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution
  37. 37.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  38. 38.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  39. 39.True or false: salt water is an acid. (a) True (b) False
  40. 40.True or false: soap solution keeps turmeric yellow. (a) True (b) False

Answer key

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

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