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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 800 · 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.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it turns to sugar (d) it grows faster
  2. 2.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  3. 3.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a magnet (c) a small bottle (d) sugar
  4. 4.True or false: salt is something yeast needs. (a) False (b) True
  5. 5.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
  6. 6.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
  7. 7.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) warm water (d) sugar
  8. 8.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a small bottle (d) a paper clip
  9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
  10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a magnet (d) a balloon
  11. 11.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of water (c) the water temperature
  13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
  14. 14.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  15. 15.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
  16. 16.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
  18. 18.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold kills sugar (d) cold makes it pink
  19. 19.True or false: vinegar is something yeast does not need. (a) False (b) True
  20. 20.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
  21. 21.⚖️ 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
  22. 22.True or false: sunlight is something yeast does not need. (a) False (b) True
  23. 23.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is bigger (d) the balloon is smaller
  24. 24.🔍 Which is the odd one out? (a) sugar (b) time (c) a magnet (d) warm water
  25. 25.True or false: vinegar is something yeast needs. (a) True (b) False
  26. 26.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) a magnet (d) turmeric powder
  27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) dry yeast (c) a small bottle (d) sugar
  28. 28.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a magnet (d) warm water
  29. 29.True or false: time is something yeast does not need. (a) True (b) False
  30. 30.⚖️ 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 yeast (b) size of the balloon (c) the amount of water (d) the same bottles
  31. 31.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
  32. 32.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  33. 33.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
  34. 34.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
  35. 35.True or false: sugar is needed for the yeast balloon. (a) False (b) True
  36. 36.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  37. 37.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) smoke (d) air from outside
  38. 38.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  39. 39.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
  40. 40.⚖️ 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

Answer key

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

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