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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 183 · 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.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
  2. 2.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
  3. 3.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) it shrinks to nothing (d) the balloon is smaller
  4. 4.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a kind of sugar (d) a tiny living fungus
  5. 5.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
  6. 6.⚖️ 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
  7. 7.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
  8. 8.True or false: warm water is something yeast does not need. (a) True (b) False
  9. 9.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a mirror (d) sugar
  10. 10.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
  11. 11.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) a magnet
  12. 12.⚖️ 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 yeast (b) the amount of water (c) the water temperature (d) the same bottles
  13. 13.⚖️ 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 measure it (c) we keep it the same
  14. 14.True or false: sunlight is something yeast needs. (a) False (b) True
  15. 15.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) time (d) sugar
  16. 16.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) warm water (d) vinegar
  17. 17.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  18. 18.⚖️ 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
  19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) warm water (d) a small bottle
  20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) sugar (d) a comb
  21. 21.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  22. 22.True or false: sugar is something yeast needs. (a) False (b) True
  23. 23.⚖️ 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
  24. 24.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  25. 25.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
  26. 26.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  27. 27.🔍 Which is the odd one out? (a) time (b) salt (c) warm water (d) sugar
  28. 28.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) air from outside (d) steam
  29. 29.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) time (d) salt
  30. 30.🔍 Which is the odd one out? (a) salt (b) a magnet (c) sugar (d) sunlight
  31. 31.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  32. 32.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) salt (d) vinegar
  33. 33.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) sunlight
  34. 34.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  35. 35.⚖️ 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 change it (c) we measure it
  36. 36.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
  37. 37.⚖️ 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 yeast (b) the water temperature (c) size of the balloon
  38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of yeast (c) the same bottles (d) the water temperature
  39. 39.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
  40. 40.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it

Answer key

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

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