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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 941 · 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) time (c) sugar (d) warm water
  2. 2.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  3. 3.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) carbon dioxide gas (d) air from outside
  4. 4.🍞 Which of these is something yeast does not need? (a) a magnet (b) time (c) warm water (d) sugar
  5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it grows very little (d) it bursts at once
  6. 6.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  7. 7.🧺 Do we need turmeric powder 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: the amount of water is what we measure. (a) True (b) False
  9. 9.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  10. 10.🔍 Which is the odd one out? (a) time (b) sugar (c) a magnet (d) warm water
  11. 11.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  12. 12.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) vinegar (d) warm water
  13. 13.True or false: warm water is something yeast does not need. (a) True (b) False
  14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) sugar (d) warm water
  15. 15.True or false: sugar is something yeast needs. (a) True (b) False
  16. 16.True or false: vinegar is something yeast does not need. (a) False (b) True
  17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a balloon (d) a comb
  18. 18.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) vinegar (d) sunlight
  19. 19.⚖️ 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
  20. 20.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of water (b) the water temperature (c) size of the balloon
  22. 22.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
  23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a small bottle (d) a magnet
  24. 24.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  25. 25.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  26. 26.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) sunlight (d) salt
  27. 27.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) salt
  28. 28.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  29. 29.True or false: salt is something yeast does not need. (a) True (b) False
  30. 30.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
  31. 31.⚖️ 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) the amount of sugar (b) the water temperature (c) the same bottles (d) the amount of yeast
  32. 32.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) warm water (d) a comb
  33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) warm water (c) sugar (d) dry yeast
  34. 34.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
  35. 35.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
  36. 36.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  37. 37.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  38. 38.True or false: sugar is something yeast does not need. (a) False (b) True
  39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
  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. salt
  2. needed
  3. carbon dioxide gas
  4. a magnet
  5. it grows very little
  6. yeast needs it
  7. not needed
  8. False
  9. not needed
  10. a magnet
  11. yeast needs it
  12. warm water
  13. False
  14. a battery cell
  15. True
  16. True
  17. a comb
  18. sugar
  19. True
  20. False
  21. the amount of water
  22. True
  23. a magnet
  24. needed
  25. yeast does not need it
  26. sugar
  27. salt
  28. not needed
  29. True
  30. False
  31. the water temperature
  32. warm water
  33. a paper clip
  34. the yeast is killed
  35. vinegar
  36. not needed
  37. needed
  38. False
  39. False
  40. we keep it the same

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