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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 908 · 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? What do we do with “the amount of yeast”? (a) we keep it the same (b) we measure it (c) we change it
  2. 2.True or false: sugar is something yeast does not need. (a) True (b) False
  3. 3.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a balloon (c) sugar (d) dry yeast
  4. 4.⚖️ 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
  5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
  6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
  7. 7.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
  8. 8.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
  9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
  10. 10.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) to make it heavy (d) it is food for yeast
  11. 11.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
  12. 12.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  13. 13.True or false: sugar is needed for the yeast balloon. (a) True (b) False
  14. 14.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  15. 15.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
  16. 16.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) vinegar (d) salt
  17. 17.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
  18. 18.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  19. 19.🔍 Which is the odd one out? (a) vinegar (b) salt (c) warm water (d) sunlight
  20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a paper clip (c) sugar (d) dry yeast
  21. 21.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  22. 22.🍞 Which of these is something yeast does not need? (a) a magnet (b) time (c) sugar (d) warm water
  23. 23.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  24. 24.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it grows very little (d) it bursts at once
  25. 25.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) dry yeast (d) a comb
  26. 26.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) sugar (d) salt
  27. 27.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  28. 28.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time
  29. 29.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  30. 30.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) time (d) vinegar
  31. 31.🛟 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
  32. 32.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) sugar (d) a comb
  34. 34.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  35. 35.True or false: time is something yeast needs. (a) False (b) True
  36. 36.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
  37. 37.⚖️ 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 measure it (c) we change it
  38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
  39. 39.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) sugar (d) a battery cell
  40. 40.⚖️ 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) True (b) False

Answer key

  1. we keep it the same
  2. False
  3. a mirror
  4. False
  5. True
  6. False
  7. True
  8. to make bread rise
  9. False
  10. it is food for yeast
  11. warm, not hot
  12. needed
  13. True
  14. not needed
  15. False
  16. warm water
  17. False
  18. False
  19. warm water
  20. a paper clip
  21. needed
  22. a magnet
  23. yeast does not need it
  24. it grows very little
  25. dry yeast
  26. sugar
  27. not needed
  28. a magnet
  29. yeast needs it
  30. time
  31. pour it down the sink
  32. yeast needs it
  33. a comb
  34. needed
  35. True
  36. True
  37. we change it
  38. False
  39. sugar
  40. False

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