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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 916 · 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) sugar (b) salt (c) warm water (d) time
  2. 2.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
  3. 3.🛟 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
  4. 4.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  5. 5.🧺 Do we need sugar 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? True or false: the amount of yeast is kept the same. (a) False (b) True
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) a mirror (d) warm water
  8. 8.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
  9. 9.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  10. 10.⚖️ 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 keep it the same (c) we measure it
  11. 11.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) sunlight (d) a magnet
  12. 12.True or false: a magnet is something yeast needs. (a) False (b) True
  13. 13.🔍 Which is the odd one out? (a) time (b) warm water (c) sunlight (d) sugar
  14. 14.⚖️ 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 measure it (c) we change it
  15. 15.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
  16. 16.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) time (d) sugar
  17. 17.True or false: sugar is something yeast needs. (a) False (b) True
  18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) turmeric powder (d) a balloon
  19. 19.⚖️ 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 amount of yeast (c) the water temperature (d) size of the balloon
  20. 20.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
  21. 21.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  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) False (b) True
  23. 23.True or false: a magnet is something yeast does not need. (a) True (b) False
  24. 24.⚖️ 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 keep it the same (c) we change it
  25. 25.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
  26. 26.True or false: vinegar is something yeast does not need. (a) True (b) False
  27. 27.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  28. 28.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  29. 29.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  30. 30.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  31. 31.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) turmeric powder (c) warm water (d) sugar
  32. 32.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  33. 33.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  34. 34.True or false: warm water is something yeast needs. (a) True (b) False
  35. 35.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  36. 36.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of sugar (d) a kind of stone
  37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
  38. 38.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  39. 39.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sunlight (d) sugar
  40. 40.True or false: time is something yeast needs. (a) False (b) True

Answer key

  1. salt
  2. True
  3. pour it down the sink
  4. needed
  5. needed
  6. True
  7. a mirror
  8. it grows very little
  9. yeast does not need it
  10. we keep it the same
  11. sugar
  12. False
  13. sunlight
  14. we change it
  15. True
  16. vinegar
  17. True
  18. turmeric powder
  19. size of the balloon
  20. the yeast is killed
  21. yeast does not need it
  22. False
  23. True
  24. we keep it the same
  25. False
  26. True
  27. yeast needs it
  28. yeast needs it
  29. needed
  30. needed
  31. turmeric powder
  32. not needed
  33. False
  34. True
  35. not needed
  36. a tiny living fungus
  37. False
  38. not needed
  39. sugar
  40. True

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