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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 444 · 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 water temperature (c) the same bottles (d) the amount of water
  2. 2.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
  3. 3.True or false: sugar is something yeast does not need. (a) True (b) False
  4. 4.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold kills sugar (d) cold makes it pink
  5. 5.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) the balloon is bigger (d) it shrinks to nothing
  6. 6.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  7. 7.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
  9. 9.⚖️ 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) True (b) False
  10. 10.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) a magnet (d) sunlight
  11. 11.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  12. 12.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a paper clip (c) sugar (d) a balloon
  13. 13.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) salt
  14. 14.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) salt (d) warm water
  15. 15.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a balloon (d) a mirror
  16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of yeast (b) the same bottles (c) the amount of water (d) the water temperature
  17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
  18. 18.⚖️ 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
  19. 19.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
  21. 21.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) time (d) sunlight
  22. 22.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) sugar (d) salt
  23. 23.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  24. 24.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  25. 25.True or false: salt is something yeast needs. (a) True (b) False
  26. 26.⚖️ 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 keep it the same (c) we change it
  27. 27.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
  28. 28.True or false: a comb is needed for the yeast balloon. (a) False (b) True
  29. 29.True or false: vinegar is something yeast needs. (a) False (b) True
  30. 30.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) salt (d) sugar
  31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a paper clip (d) sugar
  32. 32.True or false: warm water is something yeast does not need. (a) True (b) False
  33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we change it (b) we measure it (c) we keep it the same
  34. 34.⚖️ 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) True (b) False
  35. 35.True or false: warm water is needed for the yeast balloon. (a) False (b) True
  36. 36.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  37. 37.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
  38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) a balloon (d) warm water
  39. 39.🔍 Which is the odd one out? (a) time (b) salt (c) warm water (d) sugar
  40. 40.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed

Answer key

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

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