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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 527 · 40 questions
TalentJR

What you do (Yeast is alive): 1. Pour warm (not hot) water into the bottle — an adult checks it. 2. Add the yeast and the sugar and swirl gently. 3. Stretch the balloon over the bottle’s mouth. 4. Wait 30 minutes, measure the balloon, then pour the mixture away and wash up.

NameDateTime takenScore ___ / 40
  1. 1.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
  2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
  3. 3.True or false: warm water is something yeast does not need. (a) True (b) False
  4. 4.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold kills sugar (d) cold water is heavy
  5. 5.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) warm water (d) a comb
  6. 6.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) dry yeast (d) a magnet
  8. 8.🔍 Which is the odd one out? (a) vinegar (b) time (c) sunlight (d) salt
  9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
  10. 10.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
  11. 11.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
  12. 12.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
  13. 13.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sunlight (d) warm water
  14. 14.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  15. 15.True or false: time is something yeast needs. (a) True (b) False
  16. 16.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) a magnet
  17. 17.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  18. 18.True or false: a magnet is something yeast needs. (a) True (b) False
  19. 19.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) time (d) sugar
  20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) sugar (d) a balloon
  21. 21.True or false: vinegar is something yeast needs. (a) False (b) True
  22. 22.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
  23. 23.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  24. 24.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) turmeric powder (d) a small bottle
  25. 25.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) time (d) sunlight
  26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
  27. 27.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  28. 28.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  29. 29.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) turmeric powder (d) a small bottle
  30. 30.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
  31. 31.True or false: salt is something yeast does not need. (a) True (b) False
  32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
  33. 33.🍞 Which of these is something yeast needs? (a) a magnet (b) sugar (c) salt (d) sunlight
  34. 34.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
  35. 35.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the same bottles (c) the amount of yeast (d) size of the balloon
  37. 37.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) dry yeast (d) a mirror
  38. 38.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a kind of sugar (d) a tiny living fungus
  39. 39.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) sugar (d) time
  40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a small bottle (d) turmeric powder

Answer key

  1. True
  2. we measure it
  3. False
  4. cold slows yeast down
  5. a comb
  6. not needed
  7. a magnet
  8. time
  9. pour it down the sink
  10. True
  11. the balloon is bigger
  12. True
  13. warm water
  14. needed
  15. True
  16. a magnet
  17. needed
  18. False
  19. sunlight
  20. a comb
  21. False
  22. True
  23. yeast does not need it
  24. a small bottle
  25. time
  26. we keep it the same
  27. not needed
  28. needed
  29. turmeric powder
  30. True
  31. True
  32. we keep it the same
  33. sugar
  34. yeast does not need it
  35. False
  36. size of the balloon
  37. dry yeast
  38. a tiny living fungus
  39. sunlight
  40. turmeric powder

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