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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 381 · 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.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) sugar (c) dry yeast (d) a small bottle
  2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
  3. 3.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
  4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
  5. 5.🔍 Which is the odd one out? (a) a magnet (b) salt (c) warm water (d) sunlight
  6. 6.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) warm water (c) a magnet (d) turmeric powder
  7. 7.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
  8. 8.⚖️ 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 water temperature (d) the amount of sugar
  9. 9.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  10. 10.🔍 Which is the odd one out? (a) vinegar (b) salt (c) a magnet (d) time
  11. 11.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
  12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) dry yeast (d) a comb
  13. 13.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  14. 14.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) time (d) sugar
  15. 15.⚖️ 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) True (b) False
  16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a paper clip (c) warm water (d) a balloon
  17. 17.⚖️ 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 sugar (b) the water temperature (c) the amount of water (d) the amount of yeast
  18. 18.⚖️ 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 measure it (b) we change it (c) we keep it the same
  19. 19.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  20. 20.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold
  21. 21.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) sugar (d) warm water
  22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
  23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a battery cell (d) dry yeast
  24. 24.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  25. 25.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster
  26. 26.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a comb (d) warm water
  27. 27.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) a magnet
  28. 28.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  29. 29.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) warm water (d) salt
  30. 30.🍞 Which of these is something yeast needs? (a) time (b) salt (c) vinegar (d) sunlight
  31. 31.🔍 Which is the odd one out? (a) salt (b) sunlight (c) a magnet (d) sugar
  32. 32.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  33. 33.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
  34. 34.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
  35. 35.True or false: warm water is something yeast does not need. (a) False (b) True
  36. 36.True or false: a comb 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? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
  38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) a small bottle (d) warm water
  39. 39.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) vinegar
  40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True

Answer key

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

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