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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 228 · 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? Which of these is the one thing we change? (a) the amount of yeast (b) the same bottles (c) the amount of sugar (d) the water temperature
  2. 2.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  3. 3.⚖️ 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 yeast
  4. 4.🍞 Why do we add sugar to the yeast? (a) to colour it (b) it is food for yeast (c) to make it sweet (d) to make it heavy
  5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) warm water (d) a mirror
  6. 6.⚖️ 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 sugar (c) the amount of yeast (d) the same bottles
  7. 7.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  8. 8.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
  10. 10.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a paper clip (d) sugar
  12. 12.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  13. 13.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
  14. 14.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
  15. 15.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
  16. 16.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  17. 17.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a balloon (d) turmeric powder
  18. 18.True or false: sugar is something yeast does not need. (a) False (b) True
  19. 19.True or false: time is something yeast needs. (a) True (b) False
  20. 20.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sugar (d) vinegar
  21. 21.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) time (d) salt
  22. 22.True or false: salt is something yeast needs. (a) True (b) False
  23. 23.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) the yeast is killed (d) it turns to sugar
  24. 24.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  25. 25.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  26. 26.⚖️ 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 keep it the same (b) we change it (c) we measure it
  27. 27.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  28. 28.⚖️ 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 measure it (b) we change it (c) we keep it the same
  29. 29.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) carbon dioxide gas (d) steam
  30. 30.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  31. 31.True or false: warm water is something yeast needs. (a) False (b) True
  32. 32.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  33. 33.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
  34. 34.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a comb (c) sugar (d) a balloon
  35. 35.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  36. 36.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) a magnet
  37. 37.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
  38. 38.🧺 Do we need a small bottle 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? True or false: the water temperature is kept the same. (a) True (b) False
  40. 40.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it

Answer key

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

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