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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 709 · 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.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  2. 2.⚖️ 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) False (b) True
  3. 3.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
  4. 4.True or false: vinegar is something yeast does not need. (a) True (b) False
  5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
  6. 6.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
  7. 7.🔍 Which is the odd one out? (a) warm water (b) sugar (c) a magnet (d) time
  8. 8.⚖️ 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) False (b) True
  9. 9.⚖️ 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 water (c) the water temperature (d) the amount of sugar
  10. 10.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a battery cell (d) dry yeast
  11. 11.🔍 Which is the odd one out? (a) time (b) vinegar (c) salt (d) sunlight
  12. 12.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
  13. 13.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) sugar (d) a magnet
  14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
  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 water temperature (b) the amount of water (c) the amount of yeast (d) size of the balloon
  16. 16.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  17. 17.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to make it sweet (c) to colour it (d) it is food for yeast
  18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a small bottle (c) warm water (d) a balloon
  19. 19.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
  20. 20.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  21. 21.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) a magnet (d) a mirror
  22. 22.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a tiny living fungus (d) a kind of salt
  23. 23.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  24. 24.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) salt
  25. 25.⚖️ 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) False (b) True
  26. 26.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) turmeric powder (d) warm water
  27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) warm water (d) a balloon
  28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a magnet (d) warm water
  29. 29.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
  30. 30.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) salt (d) warm water
  31. 31.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) sugar (c) a paper clip (d) turmeric powder
  32. 32.True or false: warm water is something yeast does not need. (a) True (b) False
  33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
  34. 34.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
  35. 35.⚖️ 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 change it (c) we measure it
  36. 36.🔍 Which is the odd one out? (a) time (b) sunlight (c) warm water (d) sugar
  37. 37.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  38. 38.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  39. 39.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) sugar (c) a balloon (d) warm water
  40. 40.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True

Answer key

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

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