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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 573 · 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 measure it (b) we change it (c) we keep it the same
  2. 2.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  3. 3.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  4. 4.⚖️ 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
  5. 5.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
  6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) dry yeast (d) sugar
  7. 7.🧺 Do we need a mirror 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: size of the balloon is what we measure. (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 yeast is kept the same. (a) False (b) True
  10. 10.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sunlight (d) sugar
  11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) throw it at a wall (d) put it in your mouth
  12. 12.🍞 Which of these is something yeast needs? (a) salt (b) time (c) sunlight (d) a magnet
  13. 13.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
  14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) turmeric powder (d) a small bottle
  15. 15.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold slows yeast down (c) cold water is heavy (d) cold makes it pink
  16. 16.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  17. 17.True or false: warm water is something yeast does not need. (a) True (b) False
  18. 18.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) carbon dioxide gas (d) steam
  19. 19.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  20. 20.⚖️ 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) True (b) False
  21. 21.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
  23. 23.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) warm water (d) sugar
  25. 25.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) time (d) warm water
  26. 26.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once
  27. 27.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
  28. 28.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it heavy (c) to make it sweet (d) to colour it
  29. 29.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a magnet (c) a mirror (d) a small bottle
  30. 30.True or false: salt is something yeast does not need. (a) False (b) True
  31. 31.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
  32. 32.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) time (d) sugar
  33. 33.True or false: a comb is needed for the yeast balloon. (a) False (b) True
  34. 34.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  35. 35.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  36. 36.⚖️ 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
  37. 37.🔍 Which is the odd one out? (a) vinegar (b) time (c) sugar (d) warm water
  38. 38.⚖️ 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) True (b) False
  39. 39.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) a magnet (d) sugar
  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 water temperature (b) the same bottles (c) size of the balloon

Answer key

  1. we keep it the same
  2. False
  3. yeast does not need it
  4. False
  5. True
  6. a comb
  7. not needed
  8. True
  9. True
  10. sunlight
  11. pour it down the sink
  12. time
  13. False
  14. turmeric powder
  15. cold slows yeast down
  16. not needed
  17. False
  18. carbon dioxide gas
  19. not needed
  20. False
  21. yeast needs it
  22. False
  23. yeast needs it
  24. a battery cell
  25. sunlight
  26. it grows very little
  27. True
  28. it is food for yeast
  29. a small bottle
  30. True
  31. False
  32. a magnet
  33. False
  34. yeast does not need it
  35. yeast does not need it
  36. True
  37. vinegar
  38. False
  39. a magnet
  40. the same bottles

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