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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 688 · 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: soap solution is not needed for the turmeric test. (a) True (b) False
  2. 2.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) an old shirt or apron (d) your school uniform
  3. 3.True or false: water is needed for the turmeric test. (a) False (b) True
  4. 4.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns black (d) it turns blue
  5. 5.🫧 Which of these is a base? (a) vinegar (b) tamarind water (c) curd (d) detergent water
  6. 6.True or false: yeast is needed for the turmeric test. (a) False (b) True
  7. 7.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  8. 8.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  9. 9.True or false: tamarind water is an acid. (a) False (b) True
  10. 10.🔍 Which is the odd one out? (a) lemon juice (b) sugar water (c) baking soda water (d) vinegar
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) soap solution (d) a mirror
  12. 12.True or false: water is not needed for the turmeric test. (a) False (b) True
  13. 13.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) lemon juice (d) sugar water
  14. 14.🫧 Which of these is neutral? (a) soap solution (b) salt water (c) baking soda water (d) orange juice
  15. 15.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  16. 16.🛟 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
  17. 17.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
  18. 18.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a dropper or spoon (c) a balloon (d) yeast
  19. 19.🔮 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) reddish (d) green
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a battery cell (c) turmeric powder (d) soap solution
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the turmeric paper (c) the number of drops (d) the light we look in
  22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
  23. 23.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  25. 25.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  26. 26.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  27. 27.⚖️ 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
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  29. 29.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  30. 30.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it turns blue (d) it disappears
  31. 31.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) tamarind water
  32. 32.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  33. 33.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) soap solution (d) baking soda water
  35. 35.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) a mirror (d) lemon juice
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the liquid we test (c) the light we look in (d) the colour we see
  37. 37.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) tamarind water (c) vinegar (d) plain water
  39. 39.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a magnet (c) lemon juice (d) soap solution
  40. 40.True or false: baking soda water is an acid. (a) True (b) False

Answer key

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

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