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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 629 · 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.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  2. 2.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  3. 3.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
  4. 4.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  5. 5.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a balloon (d) a comb
  6. 6.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  7. 7.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
  8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) a battery cell (d) warm water
  9. 9.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) turmeric powder (d) warm water
  11. 11.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
  12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a magnet (c) a small bottle (d) a balloon
  13. 13.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) vinegar (d) time
  14. 14.True or false: a magnet is something yeast needs. (a) True (b) False
  15. 15.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it grows faster (d) it glows
  16. 16.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
  17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
  18. 18.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  19. 19.⚖️ 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) 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 yeast”? (a) we measure it (b) we change it (c) we keep it the same
  21. 21.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
  22. 22.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) a magnet (d) sugar
  23. 23.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a paper clip (c) a magnet (d) a comb
  24. 24.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) it turns to bread (d) the balloon is smaller
  25. 25.True or false: a magnet is something yeast does not need. (a) False (b) True
  26. 26.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) time (d) warm water
  27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a magnet (c) a small bottle (d) warm water
  28. 28.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) air from outside (d) steam
  29. 29.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  30. 30.⚖️ 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
  31. 31.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) salt
  32. 32.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
  33. 33.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) sunlight (d) time
  34. 34.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of sugar (d) a kind of stone
  35. 35.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  36. 36.True or false: time is something yeast needs. (a) False (b) True
  37. 37.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) sugar (d) a paper clip
  38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) warm water (d) a mirror
  39. 39.⚖️ 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
  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) True (b) False

Answer key

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

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