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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 215 · 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 water temperature”? (a) we change it (b) we measure it (c) we keep it the same
  2. 2.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  3. 3.⚖️ 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 water temperature (b) the amount of yeast (c) the same bottles (d) the amount of sugar
  4. 4.⚖️ 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 keep it the same (c) we measure it
  5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a mirror (d) a small bottle
  6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a magnet (d) a balloon
  7. 7.⚖️ 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
  8. 8.⚖️ 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 measure it (b) we keep it the same (c) we change it
  9. 9.True or false: a magnet is something yeast does not need. (a) True (b) False
  10. 10.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
  11. 11.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  12. 12.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  13. 13.⚖️ 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 keep it the same (b) we change it (c) we measure it
  14. 14.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  15. 15.⚖️ 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) the amount of sugar (c) size of the balloon (d) the same bottles
  16. 16.True or false: sunlight is something yeast does not need. (a) False (b) True
  17. 17.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) a magnet (d) salt
  18. 18.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to make bread rise (d) to colour rice
  19. 19.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  20. 20.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  21. 21.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
  22. 22.True or false: sunlight is something yeast needs. (a) True (b) False
  23. 23.True or false: sugar is needed for the yeast balloon. (a) False (b) True
  24. 24.True or false: warm water is something yeast does not need. (a) False (b) True
  25. 25.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it grows very little (d) it turns yellow
  26. 26.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold kills sugar (d) cold makes it pink
  27. 27.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
  28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) sugar (c) warm water (d) dry yeast
  29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
  30. 30.True or false: a magnet is something yeast needs. (a) True (b) False
  31. 31.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  32. 32.True or false: vinegar is something yeast does not need. (a) True (b) False
  33. 33.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
  34. 34.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
  35. 35.🧺 Do we need turmeric powder 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? True or false: size of the balloon is kept the same. (a) True (b) False
  37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a battery cell (d) a small bottle
  38. 38.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) smoke (d) air from outside
  39. 39.🔍 Which is the odd one out? (a) salt (b) warm water (c) a magnet (d) sunlight
  40. 40.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) time (d) warm water

Answer key

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

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