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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 434 · 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 needed for the yeast balloon? (a) a paper clip (b) turmeric powder (c) sugar (d) a mirror
  2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
  3. 3.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) salt (d) sugar
  4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a small bottle (d) dry yeast
  5. 5.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) a magnet (d) vinegar
  6. 6.⚖️ 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) False (b) True
  7. 7.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  8. 8.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  9. 9.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
  10. 10.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a magnet (c) a mirror (d) a paper clip
  11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a balloon (d) a comb
  12. 12.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the water temperature (c) the same bottles (d) the amount of water
  14. 14.⚖️ 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 water temperature (b) the amount of yeast (c) size of the balloon (d) the amount of sugar
  15. 15.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
  16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a battery cell (d) sugar
  17. 17.True or false: time is something yeast needs. (a) True (b) False
  18. 18.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
  19. 19.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  20. 20.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  21. 21.⚖️ 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
  22. 22.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  23. 23.True or false: sunlight is something yeast does not need. (a) True (b) False
  24. 24.True or false: sugar is something yeast needs. (a) False (b) True
  25. 25.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  26. 26.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) time (d) sugar
  27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of water
  28. 28.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  29. 29.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  30. 30.🍞 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
  31. 31.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a magnet (d) a small bottle
  32. 32.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) the balloon is smaller (d) it turns to bread
  33. 33.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold kills sugar (d) cold makes it pink
  34. 34.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) salt (d) time
  35. 35.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  36. 36.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) carbon dioxide gas (d) steam
  37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a paper clip (d) sugar
  38. 38.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
  39. 39.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
  40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True

Answer key

  1. sugar
  2. True
  3. sugar
  4. turmeric powder
  5. warm water
  6. True
  7. not needed
  8. not needed
  9. False
  10. dry yeast
  11. a comb
  12. not needed
  13. size of the balloon
  14. the water temperature
  15. pour it down the sink
  16. a battery cell
  17. True
  18. yeast does not need it
  19. False
  20. needed
  21. we change it
  22. not needed
  23. True
  24. True
  25. yeast needs it
  26. a magnet
  27. the amount of water
  28. yeast does not need it
  29. False
  30. it is food for yeast
  31. a small bottle
  32. the balloon is bigger
  33. cold slows yeast down
  34. salt
  35. yeast needs it
  36. carbon dioxide gas
  37. a paper clip
  38. True
  39. salt
  40. False

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