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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 872 · 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 something yeast does not need? (a) salt (b) time (c) warm water (d) sugar
  2. 2.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  3. 3.⚖️ 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
  4. 4.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  5. 5.⚖️ 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 change it (b) we keep it the same (c) we measure it
  6. 6.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  7. 7.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) sunlight
  8. 8.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
  9. 9.⚖️ 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 same bottles (c) the amount of water (d) size of the balloon
  10. 10.⚖️ 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 yeast (b) size of the balloon (c) the water temperature
  11. 11.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  12. 12.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) air from outside (d) carbon dioxide gas
  13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) sugar (c) dry yeast (d) warm water
  14. 14.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
  15. 15.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
  16. 16.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a paper clip (d) a small bottle
  17. 17.⚖️ 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 same bottles (b) size of the balloon (c) the water temperature (d) the amount of sugar
  18. 18.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
  19. 19.🔍 Which is the odd one out? (a) vinegar (b) time (c) a magnet (d) salt
  20. 20.⚖️ 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
  21. 21.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sugar (d) sunlight
  22. 22.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  23. 23.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  24. 24.⚖️ 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) False (b) True
  25. 25.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) sunlight (d) time
  26. 26.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to colour rice (d) to clean floors
  27. 27.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) vinegar (d) salt
  28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) False (b) True
  29. 29.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
  30. 30.True or false: warm water is something yeast needs. (a) True (b) False
  31. 31.🍞 Which of these is something yeast needs? (a) warm water (b) vinegar (c) sunlight (d) a magnet
  32. 32.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  33. 33.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) vinegar
  34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) sugar (d) a mirror
  35. 35.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) to colour it (d) it is food for yeast
  36. 36.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
  37. 37.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) dry yeast (d) a magnet
  39. 39.True or false: time is something yeast needs. (a) False (b) True
  40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) warm water (d) dry yeast

Answer key

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

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