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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 505 · 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 balloon is needed for the yeast balloon. (a) True (b) False
  2. 2.⚖️ 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 amount of sugar
  3. 3.⚖️ 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 measure it (b) we keep it the same (c) we change it
  4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a balloon (d) a paper clip
  5. 5.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) a battery cell (d) dry yeast
  6. 6.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) salt (d) time
  7. 7.🔍 Which is the odd one out? (a) warm water (b) salt (c) sunlight (d) a magnet
  8. 8.True or false: salt is something yeast does not need. (a) False (b) True
  9. 9.True or false: warm water is needed for the yeast balloon. (a) False (b) True
  10. 10.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
  11. 11.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) vinegar (d) salt
  12. 12.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  13. 13.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
  14. 14.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to clean floors (d) to make bread rise
  15. 15.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) salt (d) time
  16. 16.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  17. 17.🔍 Which is the odd one out? (a) sugar (b) time (c) vinegar (d) warm water
  18. 18.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) it is food for yeast (d) to colour it
  19. 19.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  20. 20.True or false: sugar is needed for the yeast balloon. (a) False (b) True
  21. 21.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a magnet (c) sugar (d) warm water
  22. 22.⚖️ 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
  23. 23.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  24. 24.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) sugar (d) a small bottle
  26. 26.True or false: sugar is something yeast needs. (a) False (b) True
  27. 27.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold kills sugar (d) cold makes it pink
  28. 28.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  29. 29.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) a mirror (d) a magnet
  30. 30.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
  31. 31.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
  32. 32.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
  33. 33.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  34. 34.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
  35. 35.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) salt
  36. 36.True or false: warm water is something yeast needs. (a) False (b) True
  37. 37.⚖️ 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) False (b) True
  38. 38.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  39. 39.⚖️ 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 change it (b) we keep it the same (c) we measure it
  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 yeast”? (a) we keep it the same (b) we change it (c) we measure it

Answer key

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

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