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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 79 · 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 magnet (c) dry yeast (d) sugar
  2. 2.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
  3. 3.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) time (d) sugar
  4. 4.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) smoke (d) steam
  5. 5.True or false: sugar is something yeast does not need. (a) False (b) True
  6. 6.⚖️ 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
  7. 7.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  8. 8.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) sunlight
  9. 9.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) vinegar (d) sunlight
  10. 10.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) time (d) sunlight
  11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
  12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the same bottles
  13. 13.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) sugar (d) warm water
  14. 14.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) a paper clip (d) warm water
  15. 15.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
  16. 16.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  17. 17.⚖️ 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 measure it (b) we keep it the same (c) we change it
  18. 18.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  19. 19.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
  20. 20.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to colour it (c) to make it sweet (d) to make it heavy
  21. 21.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
  22. 22.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a battery cell (c) a small bottle (d) sugar
  23. 23.True or false: a magnet is something yeast needs. (a) True (b) False
  24. 24.🔍 Which is the odd one out? (a) time (b) sugar (c) sunlight (d) warm water
  25. 25.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
  26. 26.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  27. 27.⚖️ 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
  28. 28.True or false: sugar is needed for the yeast balloon. (a) True (b) False
  29. 29.⚖️ 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
  30. 30.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sunlight (d) sugar
  31. 31.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) vinegar
  32. 32.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a magnet (c) turmeric powder (d) sugar
  33. 33.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  34. 34.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) warm water (c) sugar (d) a balloon
  36. 36.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) salt (d) sunlight
  37. 37.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) time (d) salt
  38. 38.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
  39. 39.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a comb (c) a magnet (d) a paper clip
  40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it

Answer key

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

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