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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 403 · 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.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  2. 2.True or false: plain water keeps turmeric yellow. (a) False (b) True
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  5. 5.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) plain water (c) detergent water (d) tamarind water
  7. 7.True or false: water is needed for the turmeric test. (a) False (b) True
  8. 8.🫧 Which of these is a base? (a) vinegar (b) detergent water (c) sugar water (d) plain water
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) a dropper or spoon (c) lemon juice (d) turmeric powder
  10. 10.🫧 Which of these is an acid? (a) baking soda water (b) soap solution (c) sugar water (d) lemon juice
  11. 11.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  12. 12.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your best clothes (d) your school uniform
  13. 13.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) vinegar (c) baking soda water (d) detergent water
  14. 14.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) detergent water (d) soap solution
  15. 15.True or false: tamarind water is a base. (a) False (b) True
  16. 16.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) yeast (c) water (d) white paper strips
  17. 17.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  18. 18.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the number of drops (c) the turmeric paper (d) the colour we see
  20. 20.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) soap solution (c) detergent water (d) baking soda water
  21. 21.True or false: salt water is neutral. (a) True (b) False
  22. 22.🫧 Which of these is a base? (a) tamarind water (b) baking soda water (c) plain water (d) lemon juice
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
  24. 24.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  25. 25.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) white paper strips (d) a balloon
  26. 26.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) green (d) it stays white
  27. 27.True or false: salt water is an acid. (a) False (b) True
  28. 28.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) salt water (c) soap solution (d) detergent water
  29. 29.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
  30. 30.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the light we look in (c) the liquid we test
  33. 33.True or false: curd is a base. (a) True (b) False
  34. 34.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap is magnetic (d) soap water is a base
  35. 35.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  37. 37.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) tamarind water
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the light we look in (c) the liquid we test (d) the turmeric paper
  39. 39.True or false: tamarind water is neutral. (a) True (b) False
  40. 40.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral

Answer key

  1. stays yellow
  2. True
  3. use only kitchen items
  4. True
  5. turns reddish-brown
  6. detergent water
  7. True
  8. detergent water
  9. a balloon
  10. lemon juice
  11. True
  12. an old shirt or apron
  13. vinegar
  14. lemon juice
  15. False
  16. yeast
  17. True
  18. neutral
  19. the colour we see
  20. tamarind water
  21. True
  22. baking soda water
  23. False
  24. False
  25. white paper strips
  26. reddish-brown
  27. False
  28. salt water
  29. reddish
  30. an acid
  31. we change it
  32. the light we look in
  33. False
  34. soap water is a base
  35. False
  36. we keep it the same
  37. tamarind water
  38. the liquid we test
  39. False
  40. an acid

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