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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 886 · 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.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) it shrinks to nothing (d) the balloon is bigger
  2. 2.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) a balloon (d) a paper clip
  3. 3.🔍 Which is the odd one out? (a) time (b) vinegar (c) a magnet (d) salt
  4. 4.True or false: vinegar is something yeast needs. (a) True (b) False
  5. 5.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
  6. 6.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
  7. 7.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) a magnet (d) vinegar
  8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) dry yeast (d) sugar
  9. 9.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) sugar (d) a mirror
  10. 10.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  11. 11.⚖️ 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 keep it the same (b) we change it (c) we measure it
  12. 12.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  13. 13.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  14. 14.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
  15. 15.True or false: sugar is needed for the yeast balloon. (a) True (b) False
  16. 16.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
  17. 17.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a magnet (c) dry yeast (d) a small bottle
  19. 19.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  20. 20.⚖️ 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 amount of water (b) size of the balloon (c) the same bottles (d) the water temperature
  21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) a balloon (d) a small bottle
  22. 22.⚖️ 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
  23. 23.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  24. 24.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to make it sweet (c) it is food for yeast (d) to colour it
  25. 25.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
  26. 26.⚖️ 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
  27. 27.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) sunlight (d) salt
  28. 28.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  29. 29.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  30. 30.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  31. 31.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  32. 32.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) salt (d) vinegar
  33. 33.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  34. 34.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
  35. 35.⚖️ 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
  36. 36.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
  37. 37.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) warm water (d) sunlight
  38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a small bottle (d) a paper clip
  39. 39.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  40. 40.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) time (d) sugar

Answer key

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

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