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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 254 · 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? True or false: the amount of yeast is what we measure. (a) True (b) False
  2. 2.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
  3. 3.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) the balloon is bigger (d) it shrinks to nothing
  4. 4.⚖️ 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) True (b) False
  5. 5.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) salt (d) time
  6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
  7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
  8. 8.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  9. 9.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) sugar (d) warm water
  10. 10.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it turns yellow (d) it grows much faster
  11. 11.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  12. 12.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) sunlight
  13. 13.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) turmeric powder (d) a paper clip
  14. 14.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) warm water (c) dry yeast (d) a balloon
  15. 15.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  16. 16.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sunlight (d) warm water
  17. 17.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  18. 18.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
  19. 19.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) a comb (d) sugar
  21. 21.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a battery cell (d) a balloon
  23. 23.True or false: salt is something yeast does not need. (a) False (b) True
  24. 24.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a paper clip (d) warm water
  25. 25.🍞 Which of these is something yeast does not need? (a) salt (b) warm water (c) sugar (d) time
  26. 26.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
  27. 27.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) sugar (d) vinegar
  28. 28.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a balloon (d) a magnet
  29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
  30. 30.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a small bottle (d) a mirror
  31. 31.True or false: a magnet is something yeast needs. (a) False (b) True
  32. 32.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
  33. 33.🧺 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) sugar
  34. 34.🔍 Which is the odd one out? (a) time (b) sugar (c) vinegar (d) warm water
  35. 35.True or false: warm water is something yeast needs. (a) False (b) True
  36. 36.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) a magnet
  37. 37.⚖️ 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 change it (b) we keep it the same (c) we measure it
  38. 38.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  39. 39.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) size of the balloon (c) the amount of sugar (d) the amount of yeast

Answer key

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

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