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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 622 · 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.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  2. 2.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
  3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) dry yeast (d) a magnet
  4. 4.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) a magnet
  5. 5.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) salt (d) a magnet
  6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) sugar (d) a balloon
  8. 8.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
  9. 9.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  10. 10.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  11. 11.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  12. 12.True or false: sugar is something yeast does not need. (a) False (b) True
  13. 13.True or false: vinegar is something yeast needs. (a) True (b) False
  14. 14.⚖️ 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 measure it (b) we change it (c) we keep it the same
  15. 15.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) turmeric powder (d) warm water
  16. 16.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
  17. 17.🔍 Which is the odd one out? (a) time (b) warm water (c) vinegar (d) sugar
  18. 18.True or false: sugar is needed for the yeast balloon. (a) False (b) True
  19. 19.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  20. 20.True or false: salt is something yeast needs. (a) True (b) False
  21. 21.⚖️ 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 sugar (b) the same bottles (c) size of the balloon (d) the water temperature
  22. 22.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) warm water (c) sugar (d) a small bottle
  23. 23.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  24. 24.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it turns to bread (d) it shrinks to nothing
  25. 25.True or false: vinegar is something yeast does not need. (a) False (b) True
  26. 26.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a mirror (d) a balloon
  27. 27.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
  28. 28.⚖️ 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 yeast (b) the water temperature (c) size of the balloon (d) the same bottles
  29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) dry yeast (d) a paper clip
  30. 30.True or false: a magnet is something yeast needs. (a) True (b) False
  31. 31.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  32. 32.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  33. 33.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to colour rice (c) to wash dishes (d) to make bread rise
  34. 34.True or false: sunlight is something yeast does not need. (a) False (b) True
  35. 35.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) a magnet (d) salt
  36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
  37. 37.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) air from outside (d) carbon dioxide gas
  38. 38.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  39. 39.True or false: time is something yeast needs. (a) False (b) True
  40. 40.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) pour it down the sink (d) keep it for a month

Answer key

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

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