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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 273 · 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.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it glows (d) it grows faster
  2. 2.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) dry yeast (d) turmeric powder
  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) the water temperature (b) size of the balloon (c) the amount of sugar
  4. 4.True or false: salt is something yeast needs. (a) False (b) True
  5. 5.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  6. 6.🔍 Which is the odd one out? (a) salt (b) vinegar (c) warm water (d) a magnet
  7. 7.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) vinegar
  8. 8.⚖️ 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
  9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
  10. 10.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  11. 11.🔍 Which is the odd one out? (a) salt (b) sugar (c) time (d) warm water
  12. 12.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) a magnet (d) sunlight
  13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a magnet (d) a balloon
  14. 14.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) a magnet (d) sugar
  15. 15.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of yeast (c) size of the balloon (d) the amount of sugar
  17. 17.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  18. 18.🔍 Which is the odd one out? (a) a magnet (b) salt (c) vinegar (d) time
  19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a paper clip (c) warm water (d) a balloon
  20. 20.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) time (d) warm water
  21. 21.True or false: sugar is something yeast needs. (a) False (b) True
  22. 22.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  23. 23.⚖️ 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 same bottles
  24. 24.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
  25. 25.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) vinegar (d) warm water
  26. 26.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  27. 27.True or false: a magnet is something yeast needs. (a) True (b) False
  28. 28.True or false: time is something yeast does not need. (a) False (b) True
  29. 29.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  30. 30.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
  31. 31.True or false: sunlight is something yeast does not need. (a) False (b) True
  32. 32.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  33. 33.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
  34. 34.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it turns to bread (d) it shrinks to nothing
  35. 35.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) sugar (d) warm water
  36. 36.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) a mirror (d) a paper clip
  37. 37.⚖️ 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
  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? What do we do with “the water temperature”? (a) we keep it the same (b) we measure it (c) we change it
  40. 40.🍞 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

Answer key

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

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