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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 892 · 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? True or false: the colour we see is kept the same. (a) True (b) False
  2. 2.🫧 Which of these is neutral? (a) lemon juice (b) vinegar (c) baking soda water (d) sugar water
  3. 3.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it disappears (d) it turns yellow again
  4. 4.🧺 Which of these is not needed for the turmeric test? (a) water (b) turmeric powder (c) a comb (d) lemon juice
  5. 5.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  6. 6.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  7. 7.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
  8. 8.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  9. 9.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
  10. 10.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  11. 11.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) green (d) bright blue
  12. 12.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a magnet (c) lemon juice (d) white paper strips
  14. 14.🔍 Which is the odd one out? (a) plain water (b) lemon juice (c) salt water (d) soap solution
  15. 15.True or false: sugar water is a base. (a) True (b) False
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) soap solution (c) a dropper or spoon (d) white paper strips
  17. 17.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a balloon (c) lemon juice (d) white paper strips
  19. 19.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  20. 20.⚖️ 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
  21. 21.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  22. 22.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) plain water (c) baking soda water (d) soap solution
  23. 23.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) detergent water (d) soap solution
  24. 24.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  25. 25.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) turmeric powder (d) a battery cell
  26. 26.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  27. 27.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
  29. 29.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  30. 30.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  31. 31.🫧 Which of these is a base? (a) orange juice (b) vinegar (c) soap solution (d) plain water
  32. 32.True or false: detergent water is an acid. (a) True (b) False
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  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? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the light we look in (d) the colour we see
  37. 37.🫧 Which of these is an acid? (a) sugar water (b) plain water (c) soap solution (d) orange juice
  38. 38.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) plain water (d) detergent water
  39. 39.🔍 Which is the odd one out? (a) soap solution (b) vinegar (c) detergent water (d) baking soda water
  40. 40.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed

Answer key

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

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