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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 818 · 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: orange juice is an acid. (a) False (b) True
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) water (c) a dropper or spoon (d) white paper strips
  3. 3.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
  4. 4.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
  6. 6.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) reddish (d) green
  7. 7.🟡 Which of these keeps turmeric yellow? (a) plain water (b) soap solution (c) baking soda water (d) detergent water
  8. 8.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  9. 9.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
  10. 10.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  11. 11.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) reddish-brown (d) green
  12. 12.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) yeast (d) soap solution
  14. 14.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
  15. 15.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  16. 16.🔍 Which is the odd one out? (a) baking soda water (b) salt water (c) vinegar (d) lemon juice
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  18. 18.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) sip each liquid (d) mix bathroom cleaners
  19. 19.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) water (c) a comb (d) a mirror
  20. 20.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a comb (c) turmeric powder (d) yeast
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) a mirror (d) lemon juice
  22. 22.True or false: a comb is needed for the turmeric test. (a) True (b) False
  23. 23.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) a magnet (d) soap solution
  25. 25.True or false: baking soda water is an acid. (a) False (b) True
  26. 26.⚖️ 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
  27. 27.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
  29. 29.True or false: salt water is a base. (a) True (b) False
  30. 30.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  31. 31.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  32. 32.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  33. 33.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  34. 34.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  35. 35.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
  36. 36.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  38. 38.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  39. 39.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) tamarind water (d) baking soda water
  40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) water (d) a comb

Answer key

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

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