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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 112 · 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.🔍 Which is the odd one out? (a) sugar (b) warm water (c) salt (d) time
  2. 2.⚖️ 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
  3. 3.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  4. 4.⚖️ 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
  5. 5.🍞 Which of these is something yeast needs? (a) warm water (b) vinegar (c) salt (d) sunlight
  6. 6.True or false: sugar is needed for the yeast balloon. (a) True (b) False
  7. 7.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
  8. 8.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) a magnet (d) a battery cell
  9. 9.True or false: sunlight is something yeast needs. (a) True (b) False
  10. 10.⚖️ 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) size of the balloon (b) the same bottles (c) the amount of water (d) the water temperature
  11. 11.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
  12. 12.True or false: time is something yeast does not need. (a) True (b) False
  13. 13.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
  14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) dry yeast (d) a paper clip
  15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a balloon (d) a comb
  16. 16.⚖️ 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
  17. 17.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to clean floors (d) to wash dishes
  18. 18.⚖️ 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
  19. 19.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) throw it at a wall (d) put it in your mouth
  20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the water temperature (c) size of the balloon (d) the amount of sugar
  21. 21.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a mirror (d) sugar
  22. 22.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  23. 23.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) a magnet
  24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) a small bottle (c) warm water (d) dry yeast
  25. 25.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) salt
  26. 26.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) a magnet
  27. 27.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  28. 28.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  29. 29.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) dry yeast (d) turmeric powder
  31. 31.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
  32. 32.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) carbon dioxide gas (d) steam
  33. 33.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sunlight (d) a magnet
  34. 34.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) sunlight
  35. 35.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) vinegar (d) a magnet
  36. 36.True or false: warm water is needed for the yeast balloon. (a) False (b) True
  37. 37.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
  38. 38.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sugar (d) time
  39. 39.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) sugar (d) salt
  40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) a balloon (d) a small bottle

Answer key

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

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