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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 370 · 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.

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  1. 1.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) sugar (d) turmeric powder
  2. 2.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  3. 3.⚖️ 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
  4. 4.⚖️ 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
  5. 5.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a paper clip (d) dry yeast
  6. 6.⚖️ 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) False (b) True
  7. 7.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
  8. 8.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  9. 9.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) sugar (d) warm water
  10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a balloon (d) a battery cell
  11. 11.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  12. 12.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) carbon dioxide gas (d) steam
  13. 13.🍞 Which of these is something yeast needs? (a) warm water (b) vinegar (c) sunlight (d) salt
  14. 14.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  15. 15.⚖️ 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 keep it the same (b) we measure it (c) we change it
  16. 16.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is bigger (d) the balloon is smaller
  17. 17.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
  18. 18.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
  19. 19.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a mirror (c) a comb (d) turmeric powder
  20. 20.True or false: sugar is something yeast needs. (a) False (b) True
  21. 21.⚖️ 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) True (b) False
  22. 22.🍞 Which of these is something yeast needs? (a) salt (b) time (c) sunlight (d) vinegar
  23. 23.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  24. 24.🍞 Why do we add sugar to the yeast? (a) to colour it (b) it is food for yeast (c) to make it heavy (d) to make it sweet
  25. 25.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  26. 26.⚖️ 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) False (b) True
  27. 27.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  28. 28.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) sugar (d) warm water
  30. 30.True or false: warm water is needed for the yeast balloon. (a) True (b) False
  31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a small bottle (d) a mirror
  32. 32.True or false: vinegar is something yeast needs. (a) False (b) True
  33. 33.True or false: sugar is something yeast does not need. (a) True (b) False
  34. 34.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
  35. 35.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  36. 36.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
  37. 37.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  38. 38.⚖️ 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) False (b) True
  39. 39.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) warm water (d) sugar
  40. 40.⚖️ 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) True (b) False

Answer key

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

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