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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 817 · 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.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  2. 2.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) sunlight
  3. 3.⚖️ 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
  4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) sugar (d) a small bottle
  5. 5.True or false: sunlight is something yeast does not need. (a) False (b) True
  6. 6.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) time
  7. 7.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold water is heavy (d) cold makes it pink
  8. 8.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
  9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
  10. 10.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a mirror (d) dry yeast
  11. 11.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a mirror (c) a battery cell (d) a magnet
  12. 12.⚖️ 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) True (b) False
  13. 13.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) salt (d) a magnet
  14. 14.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) sugar (d) a mirror
  16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
  17. 17.True or false: warm water is something yeast needs. (a) False (b) True
  18. 18.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to colour rice (d) to clean floors
  19. 19.⚖️ 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 water (b) size of the balloon (c) the water temperature
  20. 20.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) it is food for yeast (d) to colour it
  21. 21.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  22. 22.True or false: sugar is needed for the yeast balloon. (a) False (b) True
  23. 23.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  24. 24.True or false: time is something yeast does not need. (a) True (b) False
  25. 25.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  26. 26.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  27. 27.True or false: sugar is something yeast needs. (a) True (b) False
  28. 28.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
  29. 29.⚖️ 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
  30. 30.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  31. 31.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
  32. 32.True or false: vinegar is something yeast needs. (a) True (b) False
  33. 33.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a battery cell (c) sugar (d) dry yeast
  34. 34.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) warm water (d) vinegar
  35. 35.⚖️ 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) True (b) False
  36. 36.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  37. 37.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a magnet (d) a mirror
  38. 38.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
  39. 39.⚖️ 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 measure it (b) we keep it the same (c) we change it
  40. 40.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed

Answer key

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

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