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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 135 · 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.

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  1. 1.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  2. 2.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
  4. 4.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  5. 5.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
  6. 6.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
  7. 7.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  8. 8.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  9. 9.🍞 Which of these is something yeast does not need? (a) sugar (b) a magnet (c) warm water (d) time
  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) size of the balloon (b) the same bottles (c) the water temperature (d) the amount of yeast
  11. 11.⚖️ 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 amount of water (d) the same bottles
  12. 12.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
  13. 13.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  14. 14.True or false: a magnet is something yeast needs. (a) True (b) False
  15. 15.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it turns to sugar (d) it glows
  16. 16.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  17. 17.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
  19. 19.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
  20. 20.True or false: a magnet is something yeast does not need. (a) True (b) False
  21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) False (b) True
  22. 22.True or false: sugar is needed for the yeast balloon. (a) False (b) True
  23. 23.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) sugar (d) salt
  24. 24.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  25. 25.True or false: vinegar is something yeast needs. (a) True (b) False
  26. 26.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) a magnet (d) a balloon
  27. 27.⚖️ 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 measure it (c) we keep it the same
  28. 28.🔍 Which is the odd one out? (a) time (b) sunlight (c) a magnet (d) salt
  29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) dry yeast (d) a battery cell
  30. 30.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
  31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) sugar (d) a mirror
  32. 32.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) time (d) sugar
  33. 33.True or false: time is something yeast needs. (a) True (b) False
  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) a magnet (c) a comb (d) dry yeast
  36. 36.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) a magnet (d) sunlight
  37. 37.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) sugar (d) time
  38. 38.True or false: time 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 yeast is the one thing we change. (a) False (b) True
  40. 40.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it

Answer key

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

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