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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 653 · 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.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a comb (d) dry yeast
  2. 2.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold makes it pink (c) cold water is heavy (d) cold kills sugar
  3. 3.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  4. 4.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  5. 5.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
  6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a paper clip (c) a balloon (d) a small bottle
  7. 7.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a balloon (d) a magnet
  9. 9.True or false: sugar is something yeast does not need. (a) True (b) False
  10. 10.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  11. 11.True or false: time is something yeast needs. (a) False (b) True
  12. 12.True or false: vinegar is something yeast does not need. (a) True (b) False
  13. 13.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) sugar (d) vinegar
  14. 14.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) salt (d) vinegar
  15. 15.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
  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 amount of sugar (b) the water temperature (c) size of the balloon (d) the amount of water
  17. 17.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) it turns to sugar (d) the yeast is killed
  18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) a balloon (c) sugar (d) warm water
  19. 19.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a mirror (c) turmeric powder (d) a battery cell
  20. 20.True or false: sugar is something yeast needs. (a) False (b) True
  21. 21.⚖️ 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) the same bottles (c) size of the balloon
  22. 22.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) sunlight
  23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
  24. 24.🔍 Which is the odd one out? (a) sugar (b) warm water (c) sunlight (d) time
  25. 25.⚖️ 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 water
  26. 26.⚖️ 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 change it (b) we keep it the same (c) we measure it
  27. 27.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  28. 28.⚖️ 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 sugar
  29. 29.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  30. 30.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
  31. 31.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  32. 32.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
  33. 33.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
  34. 34.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
  35. 35.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
  36. 36.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
  37. 37.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
  38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
  39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a battery cell (c) warm water (d) sugar
  40. 40.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) carbon dioxide gas (d) smoke

Answer key

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

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