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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 187 · 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.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  2. 2.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns blue (d) it turns yellow again
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
  4. 4.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  5. 5.🫧 Which of these is a base? (a) sugar water (b) plain water (c) orange juice (d) soap solution
  6. 6.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
  7. 7.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
  8. 8.🔮 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
  9. 9.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  10. 10.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  11. 11.True or false: salt water is neutral. (a) True (b) False
  12. 12.🔍 Which is the odd one out? (a) soap solution (b) vinegar (c) detergent water (d) baking soda water
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) turmeric powder (d) a magnet
  14. 14.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a dropper or spoon (c) a balloon (d) a battery cell
  15. 15.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) plain water (d) vinegar
  16. 16.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  17. 17.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) water (d) a comb
  18. 18.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  19. 19.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) salt water (c) plain water (d) vinegar
  20. 20.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) salt water (c) baking soda water (d) detergent water
  21. 21.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
  22. 22.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) lemon juice (d) a comb
  24. 24.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) lemon juice (c) soap solution (d) a balloon
  25. 25.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  26. 26.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  27. 27.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  28. 28.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) an old shirt or apron (d) your school uniform
  29. 29.⚖️ 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 turmeric paper
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the liquid we test (c) the turmeric paper (d) the colour we see
  31. 31.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  32. 32.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  33. 33.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  34. 34.True or false: detergent water is a base. (a) False (b) True
  35. 35.⚖️ 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
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) soap solution (d) a mirror
  37. 37.True or false: plain water is an acid. (a) False (b) True
  38. 38.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) lemon juice (d) a mirror
  39. 39.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
  40. 40.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed

Answer key

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

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