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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 587 · 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.⚖️ 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) size of the balloon (c) the amount of sugar (d) the water temperature
  2. 2.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold kills sugar (d) cold makes it pink
  3. 3.⚖️ 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 measure it (b) we change it (c) we keep it the same
  4. 4.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  5. 5.⚖️ 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
  6. 6.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) a balloon (d) turmeric powder
  7. 7.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) warm water (c) a magnet (d) a paper clip
  8. 8.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  9. 9.🔍 Which is the odd one out? (a) a magnet (b) time (c) sugar (d) warm water
  10. 10.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) sugar (d) a magnet
  11. 11.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) a magnet (d) sunlight
  12. 12.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  13. 13.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
  14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) warm water (d) a magnet
  15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
  16. 16.True or false: salt is something yeast does not need. (a) False (b) True
  17. 17.True or false: warm water is something yeast needs. (a) True (b) False
  18. 18.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) salt (d) sunlight
  19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) warm water (c) a balloon (d) dry yeast
  20. 20.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  21. 21.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) vinegar (d) salt
  22. 22.True or false: vinegar is something yeast does not need. (a) False (b) True
  23. 23.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
  24. 24.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
  25. 25.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  26. 26.True or false: sugar is needed for the yeast balloon. (a) True (b) False
  27. 27.⚖️ 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
  28. 28.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) sugar (d) warm water
  29. 29.⚖️ 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
  30. 30.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) time (d) a magnet
  31. 31.⚖️ 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 measure it (c) we keep it the same
  32. 32.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
  34. 34.True or false: vinegar is something yeast needs. (a) True (b) False
  35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) turmeric powder (c) dry yeast (d) sugar
  36. 36.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) sunlight
  37. 37.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) a battery cell (d) sugar
  38. 38.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) dry yeast (d) a paper clip
  39. 39.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone
  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) the water temperature (b) the amount of water (c) the amount of yeast (d) size of the balloon

Answer key

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

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