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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 885 · 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 magnet is something yeast needs. (a) False (b) True
  2. 2.True or false: vinegar is something yeast does not need. (a) False (b) True
  3. 3.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to make bread rise (d) to colour rice
  4. 4.⚖️ 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) False (b) True
  5. 5.⚖️ 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 water temperature (c) the same bottles (d) the amount of sugar
  6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
  7. 7.⚖️ 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
  8. 8.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
  9. 9.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a paper clip (c) dry yeast (d) sugar
  10. 10.True or false: salt is something yeast does not need. (a) False (b) True
  11. 11.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a magnet (c) a balloon (d) a small bottle
  12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) dry yeast (c) a balloon (d) sugar
  13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a comb (c) dry yeast (d) sugar
  14. 14.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) a small bottle (d) warm water
  15. 15.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
  16. 16.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  17. 17.🔍 Which is the odd one out? (a) time (b) sugar (c) vinegar (d) warm water
  18. 18.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) sunlight (d) time
  19. 19.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  20. 20.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) time (d) warm water
  21. 21.⚖️ 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 keep it the same (c) we change it
  22. 22.🔍 Which is the odd one out? (a) vinegar (b) salt (c) warm water (d) sunlight
  23. 23.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  24. 24.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sunlight (d) sugar
  25. 25.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  26. 26.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  27. 27.⚖️ 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 measure it (b) we keep it the same (c) we change it
  28. 28.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  29. 29.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  30. 30.⚖️ 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 keep it the same (b) we measure it (c) we change it
  31. 31.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) warm water (d) salt
  32. 32.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a battery cell (c) a magnet (d) a paper clip
  33. 33.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
  34. 34.True or false: sugar is something yeast needs. (a) False (b) True
  35. 35.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  36. 36.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
  37. 37.⚖️ 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
  38. 38.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) vinegar
  39. 39.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
  40. 40.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) sugar (d) time

Answer key

  1. False
  2. True
  3. to make bread rise
  4. False
  5. the water temperature
  6. True
  7. False
  8. warm, not hot
  9. a paper clip
  10. True
  11. a magnet
  12. a mirror
  13. a comb
  14. turmeric powder
  15. True
  16. False
  17. vinegar
  18. sunlight
  19. needed
  20. a magnet
  21. we keep it the same
  22. warm water
  23. not needed
  24. sugar
  25. yeast needs it
  26. needed
  27. we change it
  28. needed
  29. not needed
  30. we keep it the same
  31. warm water
  32. a balloon
  33. carbon dioxide gas
  34. True
  35. yeast needs it
  36. pour it down the sink
  37. True
  38. vinegar
  39. True
  40. sunlight

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