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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 576 · 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.⚖️ 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 change it (c) we measure it
  2. 2.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) turmeric powder (d) sugar
  3. 3.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  4. 4.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
  5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a balloon (d) a battery cell
  6. 6.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  7. 7.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
  8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
  9. 9.⚖️ 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
  10. 10.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) salt (d) a magnet
  11. 11.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to clean floors (d) to wash dishes
  12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) sugar (d) a mirror
  13. 13.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
  14. 14.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  15. 15.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) sunlight (d) time
  16. 16.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) a paper clip (d) dry yeast
  17. 17.🔮 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
  18. 18.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
  19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) sugar (d) a comb
  20. 20.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  21. 21.True or false: sugar is something yeast needs. (a) False (b) True
  22. 22.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  23. 23.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it glows (d) it turns to sugar
  24. 24.True or false: salt is something yeast needs. (a) True (b) False
  25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a magnet (d) a balloon
  26. 26.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  27. 27.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a balloon (d) a comb
  28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
  29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) the water temperature (c) size of the balloon
  30. 30.🍞 Which of these is something yeast does not need? (a) sugar (b) vinegar (c) time (d) warm water
  31. 31.True or false: warm water is something yeast does not need. (a) True (b) False
  32. 32.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  33. 33.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) warm water (d) time
  35. 35.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  36. 36.⚖️ 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 water (b) the amount of yeast (c) the same bottles (d) size of the balloon
  37. 37.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) a magnet (d) salt
  38. 38.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  39. 39.🍞 Which of these is something yeast needs? (a) time (b) sunlight (c) salt (d) a magnet
  40. 40.True or false: a magnet is needed for the yeast balloon. (a) True (b) False

Answer key

  1. we change it
  2. sugar
  3. needed
  4. False
  5. a battery cell
  6. yeast needs it
  7. pour it down the sink
  8. the balloon is bigger
  9. we measure it
  10. sugar
  11. to make bread rise
  12. a mirror
  13. False
  14. yeast needs it
  15. sunlight
  16. dry yeast
  17. it grows very little
  18. carbon dioxide gas
  19. a comb
  20. needed
  21. True
  22. not needed
  23. the yeast is killed
  24. False
  25. a magnet
  26. yeast does not need it
  27. a comb
  28. True
  29. the amount of sugar
  30. vinegar
  31. False
  32. False
  33. True
  34. a magnet
  35. not needed
  36. size of the balloon
  37. sugar
  38. needed
  39. time
  40. False

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