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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 623 · 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 sugar”? (a) we measure it (b) we keep it the same (c) we change it
  2. 2.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  3. 3.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  4. 4.True or false: warm water is needed for the yeast balloon. (a) False (b) True
  5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) turmeric powder (d) warm water
  6. 6.True or false: salt is something yeast needs. (a) True (b) False
  7. 7.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) sunlight (d) vinegar
  8. 8.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  9. 9.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) warm water (d) sugar
  10. 10.⚖️ 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) size of the balloon (c) the water temperature (d) the amount of water
  11. 11.🔍 Which is the odd one out? (a) time (b) a magnet (c) warm water (d) sugar
  12. 12.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  13. 13.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
  14. 14.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  15. 15.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it grows very little (d) it bursts at once
  16. 16.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a paper clip (c) a balloon (d) dry yeast
  17. 17.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a paper clip (d) a balloon
  18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) dry yeast (d) warm water
  19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
  20. 20.True or false: warm water is something yeast does not need. (a) True (b) False
  21. 21.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
  22. 22.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  23. 23.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
  24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
  25. 25.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
  26. 26.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
  27. 27.⚖️ 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) size of the balloon (c) the same bottles
  28. 28.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
  29. 29.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
  30. 30.⚖️ 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
  31. 31.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) time (d) salt
  32. 32.⚖️ 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
  33. 33.⚖️ 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
  34. 34.True or false: a comb is needed for the yeast balloon. (a) False (b) True
  35. 35.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) sugar (c) a battery cell (d) a magnet
  36. 36.True or false: sugar is something yeast does not need. (a) True (b) False
  37. 37.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) warm water (d) turmeric powder
  38. 38.True or false: sugar is something yeast needs. (a) True (b) False
  39. 39.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  40. 40.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing

Answer key

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

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