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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 263 · 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.⚖️ 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
  2. 2.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
  3. 3.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of salt (d) a kind of sugar
  4. 4.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  5. 5.🔮 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
  6. 6.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sugar (d) sunlight
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a magnet (d) dry yeast
  8. 8.🔍 Which is the odd one out? (a) sugar (b) salt (c) a magnet (d) vinegar
  9. 9.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) sunlight (d) a magnet
  10. 10.⚖️ 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) size of the balloon (b) the amount of water (c) the water temperature (d) the amount of yeast
  11. 11.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
  12. 12.True or false: a magnet is something yeast needs. (a) True (b) False
  13. 13.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
  14. 14.True or false: sunlight is something yeast does not need. (a) True (b) False
  15. 15.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
  16. 16.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
  17. 17.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it glows (d) it grows faster
  18. 18.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
  19. 19.True or false: salt 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? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
  21. 21.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
  23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) turmeric powder (d) warm water
  24. 24.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  25. 25.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) sunlight
  26. 26.True or false: salt is something yeast does not need. (a) True (b) False
  27. 27.⚖️ 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) True (b) False
  28. 28.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
  29. 29.⚖️ 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 amount of water (c) the amount of yeast (d) the water temperature
  30. 30.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  31. 31.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  32. 32.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  33. 33.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
  34. 34.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  35. 35.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) warm water (d) turmeric powder
  36. 36.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
  37. 37.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold kills sugar (d) cold slows yeast down
  38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a small bottle (c) warm water (d) a balloon
  39. 39.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  40. 40.True or false: time is something yeast needs. (a) True (b) False

Answer key

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

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