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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 868 · 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.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a magnet (c) sugar (d) a small bottle
  3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) sugar (d) a battery cell
  4. 4.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  5. 5.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
  6. 6.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) warm water (d) vinegar
  7. 7.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a balloon (c) a paper clip (d) turmeric powder
  8. 8.⚖️ 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 yeast (b) the amount of sugar (c) the water temperature (d) size of the balloon
  9. 9.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) salt (d) warm water
  10. 10.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
  11. 11.🔮 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
  12. 12.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a balloon (d) a mirror
  13. 13.⚖️ 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 yeast
  14. 14.⚖️ 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 sugar (b) the same bottles (c) the water temperature (d) size of the balloon
  15. 15.⚖️ 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
  16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
  17. 17.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a magnet (c) a battery cell (d) sugar
  18. 18.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  19. 19.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold water is heavy (d) cold slows yeast down
  20. 20.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) time (d) warm water
  21. 21.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  22. 22.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
  23. 23.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  24. 24.True or false: warm water is something yeast does not need. (a) True (b) False
  25. 25.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) turmeric powder (c) warm water (d) a balloon
  26. 26.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sunlight (d) sugar
  27. 27.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) a magnet (d) salt
  28. 28.True or false: time is something yeast does not need. (a) True (b) False
  29. 29.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) vinegar (d) time
  30. 30.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
  31. 31.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
  32. 32.⚖️ 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
  33. 33.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
  34. 34.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  35. 35.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) salt (d) vinegar
  36. 36.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) sugar (d) a magnet
  37. 37.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  38. 38.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  39. 39.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) air from outside (d) steam
  40. 40.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) warm water (d) a magnet

Answer key

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

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