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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 549 · 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: plain water turns turmeric reddish-brown. (a) True (b) False
  2. 2.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  3. 3.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) yeast (c) white paper strips (d) lemon juice
  4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) yeast (d) a dropper or spoon
  5. 5.⚖️ 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 change it (c) we measure it
  6. 6.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  7. 7.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) use only kitchen items (d) mix bathroom cleaners
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the colour we see (c) the number of drops (d) the light we look in
  9. 9.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  10. 10.🫧 Which of these is neutral? (a) vinegar (b) sugar water (c) curd (d) lemon juice
  11. 11.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) green (d) it stays white
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  13. 13.True or false: salt water is neutral. (a) True (b) False
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
  15. 15.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) detergent water (d) plain water
  16. 16.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  17. 17.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  18. 18.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  19. 19.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  20. 20.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
  21. 21.True or false: water is needed for the turmeric test. (a) False (b) True
  22. 22.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
  23. 23.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) yeast (c) soap solution (d) a magnet
  24. 24.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  25. 25.True or false: orange juice is a base. (a) True (b) False
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
  27. 27.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  28. 28.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
  29. 29.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) a mirror (d) white paper strips
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a magnet (c) water (d) lemon juice
  33. 33.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  34. 34.🫧 Which of these is a base? (a) lemon juice (b) salt water (c) soap solution (d) vinegar
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) water (d) a comb
  36. 36.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  37. 37.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the colour we see (c) the liquid we test
  39. 39.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  40. 40.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False

Answer key

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

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