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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 115 · 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.🔍 Which is the odd one out? (a) salt (b) warm water (c) time (d) sugar
  2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of sugar (b) the water temperature (c) the same bottles (d) size of the balloon
  3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a magnet (d) sugar
  4. 4.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) dry yeast (c) warm water (d) sugar
  6. 6.True or false: a magnet is something yeast needs. (a) True (b) False
  7. 7.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  8. 8.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
  9. 9.🔍 Which is the odd one out? (a) sugar (b) warm water (c) sunlight (d) time
  10. 10.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
  11. 11.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  12. 12.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
  13. 13.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  14. 14.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) salt (d) vinegar
  15. 15.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  16. 16.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
  17. 17.⚖️ 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) size of the balloon (b) the amount of yeast (c) the amount of water (d) the water temperature
  18. 18.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  19. 19.🍞 Which of these is something yeast needs? (a) vinegar (b) warm water (c) salt (d) a magnet
  20. 20.True or false: warm water is something yeast needs. (a) False (b) True
  21. 21.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
  22. 22.🔮 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
  23. 23.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) warm water (d) time
  24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
  25. 25.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) time (d) vinegar
  26. 26.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  27. 27.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
  28. 28.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  29. 29.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
  30. 30.True or false: warm water is needed for the yeast balloon. (a) False (b) True
  31. 31.⚖️ 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 change it (c) we keep it the same
  32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
  33. 33.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) salt (d) a magnet
  34. 34.⚖️ 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 change it (c) we keep it the same
  35. 35.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) smoke (d) steam
  36. 36.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) sugar (d) time
  37. 37.🍞 Which of these is something yeast does not need? (a) a magnet (b) time (c) warm water (d) sugar
  38. 38.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) turmeric powder (c) a balloon (d) dry yeast
  39. 39.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of sugar (d) a kind of stone
  40. 40.⚖️ 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

Answer key

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

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