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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 552 · 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.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of yeast (c) the amount of water (d) the same bottles
  2. 2.True or false: time is something yeast needs. (a) False (b) True
  3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
  4. 4.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) salt (d) sunlight
  5. 5.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sugar (d) salt
  6. 6.True or false: warm water is needed for the yeast balloon. (a) False (b) True
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) turmeric powder (d) dry yeast
  8. 8.True or false: sunlight is something yeast needs. (a) False (b) True
  9. 9.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) turmeric powder (d) warm water
  10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
  11. 11.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we change it (c) we measure it
  13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) a small bottle (d) warm water
  14. 14.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
  15. 15.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) a balloon (d) a magnet
  16. 16.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  17. 17.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) turmeric powder (c) a battery cell (d) sugar
  18. 18.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) sugar (d) time
  19. 19.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
  20. 20.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
  21. 21.True or false: warm water is something yeast needs. (a) False (b) True
  22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the same bottles (c) the water temperature
  23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) True (b) False
  24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a small bottle (d) warm water
  25. 25.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
  26. 26.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) sugar (d) a comb
  27. 27.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a paper clip (c) dry yeast (d) a balloon
  28. 28.🔍 Which is the odd one out? (a) time (b) salt (c) vinegar (d) sunlight
  29. 29.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
  30. 30.🔍 Which is the odd one out? (a) time (b) a magnet (c) sugar (d) warm water
  31. 31.True or false: sugar is needed for the yeast balloon. (a) True (b) False
  32. 32.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) the balloon is bigger (d) it turns to bread
  33. 33.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) vinegar
  34. 34.True or false: time is something yeast does not need. (a) False (b) True
  35. 35.True or false: a magnet is something yeast needs. (a) True (b) False
  36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
  37. 37.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) vinegar (d) warm water
  38. 38.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  39. 39.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
  40. 40.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed

Answer key

  1. size of the balloon
  2. True
  3. it grows very little
  4. sugar
  5. sugar
  6. True
  7. turmeric powder
  8. False
  9. warm water
  10. True
  11. not needed
  12. we change it
  13. a mirror
  14. yeast does not need it
  15. a balloon
  16. not needed
  17. sugar
  18. salt
  19. pour it down the sink
  20. False
  21. True
  22. the same bottles
  23. True
  24. turmeric powder
  25. False
  26. a comb
  27. a paper clip
  28. time
  29. True
  30. a magnet
  31. True
  32. the balloon is bigger
  33. vinegar
  34. False
  35. False
  36. False
  37. vinegar
  38. not needed
  39. True
  40. needed

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