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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 843 · 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? What do we do with “the amount of sugar”? (a) we change it (b) we measure it (c) we keep it the same
  2. 2.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold makes it pink (d) cold kills sugar
  3. 3.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a paper clip (c) a magnet (d) dry yeast
  4. 4.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
  5. 5.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a paper clip (d) dry yeast
  6. 6.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  7. 7.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
  8. 8.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) a magnet (d) vinegar
  9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
  10. 10.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  11. 11.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) vinegar
  12. 12.⚖️ 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) True (b) False
  13. 13.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
  14. 14.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
  15. 15.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
  16. 16.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
  17. 17.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) vinegar (d) a magnet
  18. 18.True or false: time is something yeast does not need. (a) True (b) False
  19. 19.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  20. 20.🔍 Which is the odd one out? (a) sunlight (b) time (c) sugar (d) warm water
  21. 21.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  22. 22.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) salt
  23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
  24. 24.🔍 Which is the odd one out? (a) salt (b) vinegar (c) a magnet (d) sugar
  25. 25.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) air from outside (d) smoke
  26. 26.⚖️ 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
  27. 27.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it sweet (c) to colour it (d) to make it heavy
  28. 28.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) warm water (d) sugar
  29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) a mirror (d) sugar
  30. 30.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) warm water (c) a battery cell (d) a magnet
  31. 31.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  32. 32.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a kind of sugar (d) a tiny living fungus
  33. 33.⚖️ 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 water temperature (c) the amount of sugar (d) size of the balloon
  34. 34.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a battery cell (d) warm water
  36. 36.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  37. 37.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  38. 38.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
  39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
  40. 40.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) a magnet (d) dry yeast

Answer key

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

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