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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 312 · 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.🔍 Which is the odd one out? (a) sugar (b) salt (c) warm water (d) time
  2. 2.True or false: salt is something yeast does not need. (a) False (b) True
  3. 3.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
  4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of water (c) size of the balloon
  5. 5.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
  6. 6.True or false: warm water is something yeast needs. (a) True (b) False
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) warm water (c) sugar (d) a balloon
  8. 8.⚖️ 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) True (b) False
  9. 9.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
  10. 10.⚖️ 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) True (b) False
  11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) the water temperature (c) size of the balloon
  12. 12.⚖️ 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) the same bottles (b) size of the balloon (c) the water temperature (d) the amount of sugar
  13. 13.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) it is food for yeast (d) to make it heavy
  14. 14.⚖️ 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
  15. 15.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) turmeric powder (d) dry yeast
  17. 17.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  18. 18.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) warm water (d) a magnet
  19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a mirror (d) dry yeast
  20. 20.True or false: vinegar is something yeast does not need. (a) False (b) True
  21. 21.🔍 Which is the odd one out? (a) vinegar (b) time (c) sugar (d) warm water
  22. 22.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  23. 23.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
  24. 24.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold slows yeast down (d) cold makes it pink
  25. 25.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) a small bottle (d) a magnet
  26. 26.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) sugar (d) time
  27. 27.🍞 Which of these is something yeast needs? (a) salt (b) time (c) a magnet (d) sunlight
  28. 28.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  29. 29.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  30. 30.True or false: salt is something yeast needs. (a) True (b) False
  31. 31.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  32. 32.True or false: vinegar is something yeast needs. (a) False (b) True
  33. 33.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
  34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a small bottle (c) warm water (d) sugar
  35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) dry yeast (d) a magnet
  36. 36.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) smoke (d) carbon dioxide gas
  37. 37.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a balloon (c) a battery cell (d) a magnet
  38. 38.True or false: sugar is something yeast needs. (a) False (b) True
  39. 39.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) a magnet (d) sunlight
  40. 40.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall

Answer key

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

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