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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 490 · 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: a magnet is needed for the turmeric test. (a) False (b) True
  2. 2.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) plain water (c) lemon juice (d) baking soda water
  3. 3.🧺 Which of these is needed for the turmeric test? (a) yeast (b) turmeric powder (c) a comb (d) a balloon
  4. 4.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  5. 5.True or false: salt water is neutral. (a) False (b) True
  6. 6.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns darker red (d) it turns yellow again
  7. 7.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  8. 8.True or false: soap solution is a base. (a) False (b) True
  9. 9.🫧 Which of these is a base? (a) tamarind water (b) soap solution (c) lemon juice (d) plain water
  10. 10.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it stays yellow (d) it turns blue
  11. 11.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
  12. 12.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) soap solution (d) a battery cell
  14. 14.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the light we look in (d) the turmeric paper
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
  18. 18.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  19. 19.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  21. 21.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is an acid (d) soap is hot
  22. 22.🔍 Which is the odd one out? (a) lemon juice (b) sugar water (c) tamarind water (d) soap solution
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
  24. 24.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  25. 25.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) plain water
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the colour we see (c) the light we look in (d) the liquid we test
  27. 27.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  28. 28.🫧 Which of these is a base? (a) salt water (b) detergent water (c) lemon juice (d) orange juice
  29. 29.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  30. 30.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) tamarind water (d) baking soda water
  31. 31.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) plain water (d) detergent water
  32. 32.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  33. 33.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
  34. 34.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  35. 35.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  36. 36.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  37. 37.True or false: lemon juice is neutral. (a) False (b) True
  38. 38.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) vinegar (d) soap solution
  39. 39.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  40. 40.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral

Answer key

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

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