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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 565 · 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? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
  2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) a small bottle (d) a balloon
  3. 3.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
  4. 4.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  5. 5.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) salt (d) a magnet
  6. 6.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
  7. 7.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
  8. 8.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  9. 9.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  10. 10.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) sugar (d) a magnet
  11. 11.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) a comb (d) dry yeast
  12. 12.True or false: vinegar is something yeast does not need. (a) False (b) True
  13. 13.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  14. 14.⚖️ 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 measure it (c) we keep it the same
  15. 15.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) a mirror (d) a magnet
  16. 16.⚖️ 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 same bottles
  17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
  18. 18.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
  19. 19.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
  21. 21.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) air from outside (d) smoke
  22. 22.🍞 Which of these is something yeast does not need? (a) vinegar (b) time (c) warm water (d) sugar
  23. 23.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a comb (c) dry yeast (d) a balloon
  24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of yeast (b) size of the balloon (c) the same bottles (d) the water temperature
  25. 25.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) time (d) sugar
  26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) warm water (c) a balloon (d) dry yeast
  27. 27.True or false: sunlight is something yeast does not need. (a) False (b) True
  28. 28.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) put it in your mouth (d) throw it at a wall
  29. 29.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) sugar (d) time
  30. 30.⚖️ 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
  31. 31.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
  32. 32.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  33. 33.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a magnet (d) warm water
  34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) a balloon (d) dry yeast
  35. 35.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  36. 36.True or false: warm water is needed for the yeast balloon. (a) True (b) False
  37. 37.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  38. 38.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) sugar (d) time
  39. 39.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a small bottle (d) a comb
  40. 40.🍞 Which of these is something yeast needs? (a) time (b) vinegar (c) salt (d) a magnet

Answer key

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

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