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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 192 · 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: lemon juice is needed for the turmeric test. (a) False (b) True
  2. 2.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) sip each liquid (d) use only kitchen items
  3. 3.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
  4. 4.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a magnet (c) a battery cell (d) a balloon
  5. 5.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) a balloon (d) turmeric powder
  6. 6.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) sugar water (c) baking soda water (d) detergent water
  7. 7.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the number of drops (c) the turmeric paper (d) the colour we see
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
  10. 10.🫧 Which of these is neutral? (a) orange juice (b) detergent water (c) curd (d) plain water
  11. 11.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) tamarind water (c) plain water (d) lemon juice
  12. 12.🔍 Which is the odd one out? (a) baking soda water (b) sugar water (c) detergent water (d) soap solution
  13. 13.True or false: water is not needed for the turmeric test. (a) True (b) False
  14. 14.True or false: salt water is an acid. (a) False (b) True
  15. 15.True or false: detergent water is neutral. (a) True (b) False
  16. 16.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) water (d) a balloon
  18. 18.⚖️ 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 measure it (c) we change it
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  20. 20.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap water is a base (d) soap is an acid
  21. 21.⚖️ 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
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) yeast (d) a dropper or spoon
  23. 23.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  24. 24.🫧 Which of these is a base? (a) lemon juice (b) sugar water (c) soap solution (d) salt water
  25. 25.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  26. 26.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) lemon juice (c) soap solution (d) sugar water
  27. 27.True or false: tamarind water is an acid. (a) False (b) True
  28. 28.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns yellow again (d) it turns blue
  29. 29.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) reddish (d) green
  30. 30.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  32. 32.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) lemon juice (d) detergent water
  33. 33.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  34. 34.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  35. 35.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) soap solution (c) water (d) white paper strips
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) a mirror (d) lemon juice
  37. 37.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  38. 38.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  39. 39.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns black (d) it turns blue
  40. 40.True or false: a balloon is needed for the turmeric test. (a) False (b) True

Answer key

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

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