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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 897 · 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.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  2. 2.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) salt (d) a magnet
  3. 3.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
  5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow
  6. 6.⚖️ 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
  7. 7.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) sugar (d) time
  8. 8.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a magnet (c) a small bottle (d) sugar
  9. 9.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) warm water (d) a battery cell
  10. 10.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a mirror (c) warm water (d) a small bottle
  11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
  12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
  13. 13.True or false: sunlight is something yeast does not need. (a) True (b) False
  14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) warm water (d) a battery cell
  15. 15.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  16. 16.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) vinegar
  17. 17.⚖️ 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
  18. 18.True or false: vinegar is something yeast needs. (a) False (b) True
  19. 19.⚖️ 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 measure it (b) we change it (c) we keep it the same
  20. 20.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
  21. 21.True or false: salt is something yeast needs. (a) False (b) True
  22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
  23. 23.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
  24. 24.⚖️ 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) True (b) False
  25. 25.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) salt (d) sugar
  26. 26.True or false: warm water is something yeast needs. (a) True (b) False
  27. 27.🔍 Which is the odd one out? (a) salt (b) sunlight (c) time (d) vinegar
  28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a magnet (d) warm water
  29. 29.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
  30. 30.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing
  31. 31.🔍 Which is the odd one out? (a) time (b) sunlight (c) warm water (d) sugar
  32. 32.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  33. 33.⚖️ 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
  34. 34.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
  35. 35.True or false: sugar is something yeast needs. (a) True (b) False
  36. 36.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  37. 37.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) warm water (d) sunlight
  38. 38.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
  39. 39.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  40. 40.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it

Answer key

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

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