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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 597 · 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.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  2. 2.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  4. 4.🫧 Which of these is neutral? (a) soap solution (b) curd (c) detergent water (d) plain water
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  6. 6.⚖️ 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
  7. 7.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) soap solution (c) vinegar (d) tamarind water
  8. 8.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a dropper or spoon (c) yeast (d) white paper strips
  9. 9.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) plain water
  10. 10.True or false: salt water keeps turmeric yellow. (a) True (b) False
  11. 11.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) sniff each bottle hard (d) mix bathroom cleaners
  12. 12.⚖️ 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
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  14. 14.🫧 Which of these is an acid? (a) soap solution (b) detergent water (c) baking soda water (d) curd
  15. 15.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  16. 16.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) tamarind water (d) baking soda water
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
  18. 18.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  19. 19.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  20. 20.🫧 Which of these is an acid? (a) soap solution (b) vinegar (c) salt water (d) sugar water
  21. 21.🫧 Which of these is neutral? (a) tamarind water (b) orange juice (c) salt water (d) vinegar
  22. 22.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  23. 23.True or false: sugar water is neutral. (a) True (b) False
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a mirror (c) lemon juice (d) water
  25. 25.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is hot (d) soap is magnetic
  26. 26.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  27. 27.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) soap solution (d) a comb
  29. 29.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it turns blue (d) it stays yellow
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a battery cell (c) turmeric powder (d) white paper strips
  31. 31.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) tamarind water
  32. 32.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a balloon (c) lemon juice (d) water
  33. 33.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  34. 34.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  35. 35.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  36. 36.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  37. 37.⚖️ 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
  38. 38.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your best clothes (d) your school uniform
  39. 39.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) lemon juice (d) soap solution
  40. 40.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid

Answer key

  1. it stays yellow
  2. stays yellow
  3. True
  4. plain water
  5. False
  6. True
  7. soap solution
  8. yeast
  9. plain water
  10. True
  11. use only kitchen items
  12. we keep it the same
  13. False
  14. curd
  15. True
  16. tamarind water
  17. we change it
  18. not needed
  19. turns reddish-brown
  20. vinegar
  21. salt water
  22. not needed
  23. True
  24. a mirror
  25. soap water is a base
  26. False
  27. True
  28. a comb
  29. reddish-brown
  30. a battery cell
  31. tamarind water
  32. a balloon
  33. False
  34. neutral
  35. False
  36. False
  37. we keep it the same
  38. an old shirt or apron
  39. lemon juice
  40. a base

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