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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 706 · 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 turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
  2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a paper clip (c) sugar (d) warm water
  3. 3.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
  4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) sugar (d) dry yeast
  5. 5.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) sugar (d) time
  6. 6.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) salt (d) warm water
  7. 7.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) a magnet (d) sugar
  8. 8.⚖️ 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
  9. 9.True or false: vinegar is something yeast needs. (a) True (b) False
  10. 10.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  11. 11.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) a magnet (d) warm water
  12. 12.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  13. 13.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
  14. 14.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) a small bottle (d) a paper clip
  15. 15.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  16. 16.True or false: sunlight is something yeast does not need. (a) True (b) False
  17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) warm water (d) a comb
  18. 18.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  19. 19.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
  20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) warm water (d) a battery cell
  21. 21.⚖️ 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
  22. 22.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  23. 23.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
  24. 24.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  25. 25.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
  26. 26.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of sugar (d) a kind of stone
  27. 27.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) sugar (d) time
  28. 28.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) a balloon (d) a magnet
  29. 29.🔍 Which is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
  30. 30.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) dry yeast (d) a mirror
  31. 31.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) sugar (d) time
  32. 32.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) time (d) salt
  33. 33.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  34. 34.🍞 Which of these is something yeast does not need? (a) sunlight (b) warm water (c) sugar (d) time
  35. 35.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
  36. 36.⚖️ 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) True (b) False
  37. 37.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) warm water (d) sunlight
  38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we change it (c) we measure it
  39. 39.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
  40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of yeast (c) the amount of water (d) the same bottles

Answer key

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

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