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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 707 · 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: salt is something yeast does not need. (a) False (b) True
  2. 2.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) the yeast is killed (d) it turns to sugar
  3. 3.🔍 Which is the odd one out? (a) a magnet (b) time (c) salt (d) sunlight
  4. 4.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  5. 5.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
  6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) size of the balloon (c) the water temperature
  7. 7.True or false: sunlight is something yeast needs. (a) False (b) True
  8. 8.⚖️ 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 change it (b) we keep it the same (c) we measure it
  9. 9.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a comb (d) sugar
  10. 10.🔍 Which is the odd one out? (a) warm water (b) salt (c) sugar (d) time
  11. 11.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) a magnet (d) sugar
  12. 12.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
  13. 13.True or false: time is something yeast does not need. (a) False (b) True
  14. 14.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a mirror (d) a comb
  15. 15.True or false: sugar is something yeast does not need. (a) False (b) True
  16. 16.True or false: a magnet is something yeast does not need. (a) False (b) True
  17. 17.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) sunlight (d) vinegar
  18. 18.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  19. 19.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) sugar (d) time
  20. 20.🍞 Which of these is something yeast needs? (a) time (b) vinegar (c) salt (d) sunlight
  21. 21.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
  22. 22.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) warm water (d) a comb
  23. 23.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) dry yeast (d) a balloon
  24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
  25. 25.True or false: vinegar is something yeast needs. (a) False (b) True
  26. 26.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it shrinks to nothing (d) it turns to bread
  27. 27.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) warm water (d) vinegar
  28. 28.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  29. 29.True or false: a comb is needed for the yeast balloon. (a) False (b) True
  30. 30.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
  32. 32.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  33. 33.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
  34. 34.⚖️ 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 water (b) the amount of sugar (c) the water temperature (d) the amount of yeast
  35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) warm water (c) sugar (d) dry yeast
  36. 36.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
  37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) a magnet (d) dry yeast
  38. 38.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
  40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature

Answer key

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

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