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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 601 · 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.⚖️ 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 light we look in (d) the number of drops
  2. 2.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  3. 3.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  4. 4.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  5. 5.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  6. 6.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  7. 7.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  8. 8.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  9. 9.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  10. 10.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  11. 11.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) it stays white (d) reddish-brown
  12. 12.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) your best clothes (d) an old shirt or apron
  13. 13.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) sugar water
  14. 14.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) lemon juice (d) baking soda water
  15. 15.True or false: lemon juice is neutral. (a) True (b) False
  16. 16.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  17. 17.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it disappears (d) it turns blue
  18. 18.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns red (d) it turns black
  19. 19.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) plain water (d) soap solution
  20. 20.⚖️ 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
  21. 21.True or false: water is needed for the turmeric test. (a) False (b) True
  22. 22.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a balloon (c) turmeric powder (d) water
  24. 24.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) white paper strips (c) a battery cell (d) turmeric powder
  25. 25.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  26. 26.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
  27. 27.⚖️ 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 keep it the same (c) we measure it
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) a dropper or spoon (c) white paper strips (d) soap solution
  29. 29.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
  30. 30.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) plain water (d) tamarind water
  31. 31.True or false: plain water is an acid. (a) True (b) False
  32. 32.🫧 Which of these is neutral? (a) baking soda water (b) tamarind water (c) soap solution (d) plain water
  33. 33.🫧 Which of these is an acid? (a) lemon juice (b) detergent water (c) sugar water (d) baking soda water
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) water (b) a magnet (c) a dropper or spoon (d) turmeric powder
  35. 35.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) a dropper or spoon (c) turmeric powder (d) water
  37. 37.True or false: detergent water is neutral. (a) True (b) False
  38. 38.🫧 Which of these is a base? (a) baking soda water (b) tamarind water (c) salt water (d) curd
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
  40. 40.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) a battery cell (d) lemon juice

Answer key

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

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