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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 390 · 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.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) the yeast is killed (d) it glows
  2. 2.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  3. 3.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a battery cell (d) a balloon
  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) size of the balloon (b) the water temperature (c) the amount of water
  5. 5.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
  6. 6.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a small bottle (d) a balloon
  8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
  9. 9.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a balloon (c) warm water (d) sugar
  11. 11.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
  12. 12.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) salt (d) vinegar
  13. 13.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  14. 14.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  15. 15.⚖️ 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 amount of water (b) the same bottles (c) the amount of sugar (d) the water temperature
  16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a comb (c) a balloon (d) sugar
  17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
  18. 18.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) steam (d) air from outside
  19. 19.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a comb (d) warm water
  20. 20.🛟 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
  21. 21.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  22. 22.🔍 Which is the odd one out? (a) salt (b) sunlight (c) time (d) vinegar
  23. 23.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  24. 24.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) time (d) warm water
  25. 25.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) sunlight
  26. 26.True or false: sunlight is something yeast does not need. (a) True (b) False
  27. 27.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it grows very little (d) it bursts at once
  28. 28.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) warm water (d) dry yeast
  29. 29.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  30. 30.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  31. 31.⚖️ 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) True (b) False
  32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a small bottle (d) a mirror
  33. 33.True or false: warm water is needed for the yeast balloon. (a) False (b) True
  34. 34.True or false: warm water is something yeast needs. (a) False (b) True
  35. 35.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
  36. 36.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) sunlight (d) vinegar
  37. 37.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  38. 38.True or false: sunlight is something yeast needs. (a) True (b) False
  39. 39.⚖️ 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 keep it the same (b) we change it (c) we measure it
  40. 40.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it

Answer key

  1. the yeast is killed
  2. yeast does not need it
  3. a battery cell
  4. the amount of water
  5. True
  6. warm, not hot
  7. turmeric powder
  8. we measure it
  9. yeast needs it
  10. a comb
  11. True
  12. sugar
  13. not needed
  14. False
  15. the water temperature
  16. a comb
  17. True
  18. carbon dioxide gas
  19. warm water
  20. pour it down the sink
  21. needed
  22. time
  23. yeast does not need it
  24. sunlight
  25. sunlight
  26. True
  27. it grows very little
  28. turmeric powder
  29. not needed
  30. not needed
  31. False
  32. a mirror
  33. True
  34. True
  35. salt
  36. warm water
  37. needed
  38. False
  39. we keep it the same
  40. yeast needs it

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