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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 207 · 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.⚖️ 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 same bottles (c) the water temperature (d) the amount of yeast
  2. 2.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
  3. 3.True or false: vinegar is something yeast does not need. (a) False (b) True
  4. 4.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) salt
  5. 5.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) warm water (d) sugar
  8. 8.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to clean floors (d) to make bread rise
  9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a comb (d) a small bottle
  10. 10.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) warm water (d) time
  11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) a balloon (d) warm water
  12. 12.⚖️ 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 measure it (c) we keep it the same
  13. 13.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a mirror (c) sugar (d) a balloon
  14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) sugar (c) a balloon (d) a small bottle
  15. 15.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
  16. 16.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  17. 17.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
  18. 18.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  19. 19.True or false: sunlight is something yeast needs. (a) True (b) False
  20. 20.⚖️ 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 yeast
  21. 21.True or false: warm water is something yeast does not need. (a) False (b) True
  22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a battery cell (d) sugar
  23. 23.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
  24. 24.⚖️ 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 measure it (b) we change it (c) we keep it the same
  25. 25.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  26. 26.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  27. 27.⚖️ 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 sugar (b) the same bottles (c) the amount of yeast (d) the water temperature
  28. 28.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
  29. 29.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  30. 30.True or false: time is something yeast needs. (a) True (b) False
  31. 31.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold makes it pink (d) cold water is heavy
  32. 32.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  33. 33.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) vinegar (d) time
  34. 34.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  35. 35.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  36. 36.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) it shrinks to nothing (d) the balloon is smaller
  37. 37.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a kind of stone (d) a tiny living fungus
  38. 38.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) sunlight (d) salt
  39. 39.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) warm water (d) vinegar
  40. 40.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) sunlight

Answer key

  1. size of the balloon
  2. vinegar
  3. True
  4. salt
  5. not needed
  6. we keep it the same
  7. a mirror
  8. to make bread rise
  9. a comb
  10. a magnet
  11. a magnet
  12. we measure it
  13. a mirror
  14. turmeric powder
  15. True
  16. needed
  17. False
  18. needed
  19. False
  20. the amount of yeast
  21. False
  22. a battery cell
  23. pour it down the sink
  24. we change it
  25. not needed
  26. False
  27. the water temperature
  28. False
  29. yeast needs it
  30. True
  31. cold slows yeast down
  32. not needed
  33. time
  34. yeast does not need it
  35. not needed
  36. the balloon is bigger
  37. a tiny living fungus
  38. sugar
  39. warm water
  40. sunlight

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