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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 253 · 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 turns turmeric reddish-brown. (a) False (b) True
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) water (d) a comb
  3. 3.⚖️ 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
  4. 4.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  5. 5.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  6. 6.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) lemon juice (d) yeast
  7. 7.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns darker red (d) it turns yellow again
  8. 8.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
  9. 9.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  10. 10.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
  11. 11.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  12. 12.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  14. 14.⚖️ 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
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  16. 16.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) soap solution (c) white paper strips (d) turmeric powder
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) white paper strips (d) a balloon
  19. 19.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  20. 20.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  21. 21.⚖️ 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 measure it (c) we change it
  22. 22.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  23. 23.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it stays yellow (c) it turns black (d) it turns red
  24. 24.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  25. 25.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
  27. 27.🫧 Which of these is neutral? (a) tamarind water (b) baking soda water (c) plain water (d) vinegar
  28. 28.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) sugar water (d) plain water
  29. 29.True or false: vinegar is neutral. (a) True (b) False
  30. 30.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
  31. 31.True or false: curd is neutral. (a) False (b) True
  32. 32.True or false: lemon juice is an acid. (a) False (b) True
  33. 33.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  34. 34.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
  35. 35.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
  36. 36.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) salt water (d) baking soda water
  37. 37.🔍 Which is the odd one out? (a) sugar water (b) baking soda water (c) detergent water (d) soap solution
  38. 38.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  39. 39.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) turmeric powder (c) a mirror (d) a balloon
  40. 40.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed

Answer key

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

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