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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 326 · 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: yeast is not needed for the turmeric test. (a) True (b) False
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
  3. 3.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  7. 7.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
  8. 8.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
  9. 9.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) tamarind water (c) sugar water (d) salt water
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
  11. 11.🫧 Which of these is a base? (a) curd (b) sugar water (c) lemon juice (d) detergent water
  12. 12.🔮 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
  13. 13.⚖️ 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
  14. 14.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) white paper strips (d) a mirror
  15. 15.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it stays yellow (d) it turns green
  16. 16.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  17. 17.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  19. 19.True or false: tamarind water is a base. (a) True (b) False
  20. 20.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  21. 21.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) turmeric powder (c) water (d) a dropper or spoon
  22. 22.True or false: plain water keeps turmeric yellow. (a) False (b) True
  23. 23.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  24. 24.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  25. 25.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) water (d) yeast
  26. 26.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) green (d) bright blue
  27. 27.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  28. 28.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns yellow again (d) it turns darker red
  29. 29.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  30. 30.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) tamarind water (d) lemon juice
  31. 31.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  32. 32.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  33. 33.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
  35. 35.🫧 Which of these is neutral? (a) lemon juice (b) plain water (c) tamarind water (d) vinegar
  36. 36.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) tamarind water
  37. 37.🧺 Which of these is needed for the turmeric test? (a) water (b) a mirror (c) a magnet (d) yeast
  38. 38.True or false: lemon juice is an acid. (a) False (b) True
  39. 39.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  40. 40.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed

Answer key

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

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