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Yeast Balloon Experiment Worksheet

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

Answer key

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

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