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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 756 · 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? True or false: the amount of water is kept the same. (a) False (b) True
  2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a magnet (d) a balloon
  3. 3.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) warm water (c) sugar (d) a balloon
  4. 4.⚖️ 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 keep it the same (b) we measure it (c) we change it
  5. 5.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  6. 6.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
  7. 7.True or false: warm water is something yeast needs. (a) True (b) False
  8. 8.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
  9. 9.🔍 Which is the odd one out? (a) time (b) warm water (c) sunlight (d) sugar
  10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a mirror (c) a small bottle (d) sugar
  11. 11.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
  12. 12.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
  13. 13.⚖️ 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
  14. 14.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
  15. 15.True or false: salt is something yeast does not need. (a) False (b) True
  16. 16.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) warm water (d) vinegar
  17. 17.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
  18. 18.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a comb (d) a small bottle
  20. 20.🔍 Which is the odd one out? (a) warm water (b) salt (c) time (d) sugar
  21. 21.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it bursts at once (d) it grows very little
  22. 22.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
  23. 23.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) sugar (c) a mirror (d) turmeric powder
  24. 24.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a balloon (c) turmeric powder (d) a magnet
  25. 25.⚖️ 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) True (b) False
  26. 26.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  27. 27.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
  28. 28.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) salt
  29. 29.True or false: time is something yeast does not need. (a) True (b) False
  30. 30.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
  31. 31.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) warm water (d) a battery cell
  32. 32.⚖️ 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) False (b) True
  33. 33.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to colour rice (d) to wash dishes
  34. 34.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  35. 35.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  36. 36.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it turns to sugar (d) it grows faster
  37. 37.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a small bottle (d) a magnet
  38. 38.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to make it sweet (c) to colour it (d) it is food for yeast
  39. 39.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) vinegar
  40. 40.⚖️ 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 amount of sugar (c) the water temperature

Answer key

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

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