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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 300 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) warm water (d) a mirror
  2. 2.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) sunlight (d) salt
  3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) dry yeast (c) warm water (d) a balloon
  4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
  5. 5.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
  6. 6.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
  7. 7.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a magnet (c) dry yeast (d) warm water
  8. 8.True or false: sunlight is something yeast needs. (a) False (b) True
  9. 9.🛟 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
  10. 10.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  11. 11.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
  12. 12.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  13. 13.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  14. 14.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  15. 15.🔍 Which is the odd one out? (a) sugar (b) warm water (c) salt (d) time
  16. 16.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to clean floors (d) to colour rice
  17. 17.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  18. 18.True or false: vinegar is something yeast does not need. (a) False (b) True
  19. 19.⚖️ 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) False (b) True
  20. 20.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) sugar (d) a magnet
  21. 21.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  22. 22.⚖️ 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
  23. 23.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  24. 24.True or false: vinegar is something yeast needs. (a) False (b) True
  25. 25.⚖️ 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
  26. 26.⚖️ 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 keep it the same (b) we measure it (c) we change it
  27. 27.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a small bottle (d) turmeric powder
  28. 28.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) a magnet (d) turmeric powder
  29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
  30. 30.🔮 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 bigger (d) the balloon is smaller
  31. 31.True or false: sunlight is something yeast does not need. (a) True (b) False
  32. 32.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) warm water (d) salt
  33. 33.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  34. 34.True or false: warm water is something yeast needs. (a) False (b) True
  35. 35.⚖️ 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) True (b) False
  36. 36.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) vinegar
  37. 37.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  38. 38.⚖️ 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) size of the balloon (b) the same bottles (c) the water temperature (d) the amount of yeast
  39. 39.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) time (d) sunlight
  40. 40.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False

Answer key

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

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