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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 992 · 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.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) throw it at a wall (d) put it in your mouth
  2. 2.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) sugar (d) dry yeast
  4. 4.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  5. 5.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  6. 6.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
  7. 7.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  8. 8.True or false: warm water is something yeast does not need. (a) True (b) False
  9. 9.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a small bottle (d) a magnet
  10. 10.True or false: salt is something yeast does not need. (a) True (b) False
  11. 11.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) warm water (c) turmeric powder (d) a magnet
  12. 12.🍞 Which of these is something yeast needs? (a) sugar (b) salt (c) a magnet (d) sunlight
  13. 13.⚖️ 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
  14. 14.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) carbon dioxide gas (d) smoke
  15. 15.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
  16. 16.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
  18. 18.🔍 Which is the odd one out? (a) warm water (b) sugar (c) a magnet (d) time
  19. 19.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
  20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a mirror (c) a small bottle (d) warm water
  21. 21.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  22. 22.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to clean floors (d) to colour rice
  23. 23.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  24. 24.⚖️ 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
  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 sugar to make gas? (a) yeast needs it (b) yeast does not need it
  27. 27.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
  28. 28.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  29. 29.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
  30. 30.🔍 Which is the odd one out? (a) sugar (b) time (c) sunlight (d) warm water
  31. 31.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  32. 32.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
  33. 33.True or false: time is something yeast needs. (a) False (b) True
  34. 34.⚖️ 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 water temperature (c) the amount of water (d) the amount of yeast
  35. 35.True or false: sugar is something yeast needs. (a) False (b) True
  36. 36.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
  37. 37.🔍 Which is the odd one out? (a) vinegar (b) salt (c) sunlight (d) time
  38. 38.⚖️ 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
  39. 39.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
  40. 40.⚖️ 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 keep it the same (c) we change it

Answer key

  1. pour it down the sink
  2. False
  3. a magnet
  4. not needed
  5. not needed
  6. yeast does not need it
  7. yeast does not need it
  8. False
  9. a small bottle
  10. True
  11. warm water
  12. sugar
  13. False
  14. carbon dioxide gas
  15. a magnet
  16. not needed
  17. it grows very little
  18. a magnet
  19. warm, not hot
  20. a mirror
  21. yeast does not need it
  22. to make bread rise
  23. yeast needs it
  24. True
  25. True
  26. yeast needs it
  27. False
  28. False
  29. True
  30. sunlight
  31. not needed
  32. False
  33. True
  34. the water temperature
  35. True
  36. True
  37. time
  38. True
  39. True
  40. we keep it the same

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