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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 495 · 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: tamarind water is a base. (a) True (b) False
  2. 2.True or false: yeast is needed for the turmeric test. (a) True (b) False
  3. 3.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) white paper strips (d) a battery cell
  4. 4.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) yeast (c) a comb (d) turmeric powder
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the turmeric paper (d) the number of drops
  6. 6.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  7. 7.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your school uniform (d) your best clothes
  8. 8.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  10. 10.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  11. 11.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) baking soda water (d) lemon juice
  12. 12.True or false: plain water is neutral. (a) False (b) True
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
  14. 14.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) yeast (d) soap solution
  16. 16.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) salt water (d) detergent water
  17. 17.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
  18. 18.🔍 Which is the odd one out? (a) salt water (b) soap solution (c) detergent water (d) baking soda water
  19. 19.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) soap solution (c) tamarind water (d) salt water
  21. 21.True or false: plain water is a base. (a) False (b) True
  22. 22.🫧 Which of these is neutral? (a) lemon juice (b) tamarind water (c) plain water (d) orange juice
  23. 23.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  24. 24.⚖️ 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
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  26. 26.🫧 Which of these is an acid? (a) sugar water (b) baking soda water (c) salt water (d) vinegar
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
  28. 28.True or false: soap solution is a base. (a) True (b) False
  29. 29.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  30. 30.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
  32. 32.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  33. 33.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) soap solution (d) a mirror
  35. 35.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
  37. 37.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) lemon juice (d) a magnet
  39. 39.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  40. 40.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) salt water (d) plain water

Answer key

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

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