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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 62 · 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.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  2. 2.⚖️ 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 keep it the same (b) we measure it (c) we change it
  3. 3.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  4. 4.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
  5. 5.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) warm water (d) turmeric powder
  7. 7.True or false: vinegar is something yeast needs. (a) True (b) False
  8. 8.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a magnet (c) a mirror (d) turmeric powder
  9. 9.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  10. 10.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
  11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) dry yeast (d) a balloon
  12. 12.⚖️ 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
  13. 13.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a small bottle (d) turmeric powder
  14. 14.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) sugar (d) time
  15. 15.🛟 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
  16. 16.True or false: vinegar is something yeast does not need. (a) False (b) True
  17. 17.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) time (d) vinegar
  18. 18.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  19. 19.⚖️ 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
  20. 20.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  21. 21.🔍 Which is the odd one out? (a) salt (b) a magnet (c) sunlight (d) sugar
  22. 22.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) a magnet (d) sunlight
  23. 23.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
  24. 24.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) sunlight
  25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
  26. 26.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of stone (d) a kind of sugar
  27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
  28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
  29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a balloon (d) a paper clip
  30. 30.True or false: time is something yeast does not need. (a) False (b) True
  31. 31.True or false: warm water is something yeast needs. (a) False (b) True
  32. 32.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) salt
  33. 33.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) warm water (d) sugar
  34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) warm water (d) a magnet
  35. 35.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  36. 36.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
  37. 37.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a mirror (d) warm water
  38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) warm water (d) a magnet
  39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
  40. 40.🔮 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

Answer key

  1. needed
  2. we keep it the same
  3. yeast needs it
  4. warm, not hot
  5. not needed
  6. turmeric powder
  7. False
  8. a small bottle
  9. needed
  10. the balloon is bigger
  11. a battery cell
  12. we change it
  13. turmeric powder
  14. sunlight
  15. pour it down the sink
  16. True
  17. time
  18. not needed
  19. False
  20. needed
  21. sugar
  22. warm water
  23. True
  24. sunlight
  25. we keep it the same
  26. a tiny living fungus
  27. False
  28. False
  29. a paper clip
  30. False
  31. True
  32. salt
  33. salt
  34. a magnet
  35. yeast needs it
  36. False
  37. a mirror
  38. a magnet
  39. True
  40. the yeast is killed

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