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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 104 · 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: sunlight is something yeast needs. (a) False (b) True
  2. 2.⚖️ 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
  3. 3.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a small bottle (d) a paper clip
  4. 4.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sunlight (d) sugar
  5. 5.True or false: a magnet is something yeast needs. (a) False (b) True
  6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of yeast
  7. 7.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sunlight (d) warm water
  8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) sugar (d) a paper clip
  9. 9.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
  10. 10.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  11. 11.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  12. 12.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  13. 13.True or false: a magnet is something yeast does not need. (a) False (b) True
  14. 14.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) warm water (d) sugar
  15. 15.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  16. 16.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) warm water (d) salt
  17. 17.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) turmeric powder (d) a small bottle
  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 yeast”? (a) we change it (b) we measure it (c) we keep it the same
  19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) dry yeast (d) warm water
  20. 20.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  21. 21.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) warm water (d) a battery cell
  23. 23.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  24. 24.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
  25. 25.True or false: warm water is something yeast does not need. (a) True (b) False
  26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) turmeric powder (d) dry yeast
  27. 27.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it turns to bread (d) it shrinks to nothing
  28. 28.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
  29. 29.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
  30. 30.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it grows faster (d) it glows
  31. 31.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  32. 32.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) time (d) salt
  33. 33.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of stone (d) a kind of sugar
  34. 34.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
  36. 36.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
  38. 38.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a battery cell (c) a mirror (d) a comb
  39. 39.🍞 Which of these is something yeast does not need? (a) vinegar (b) time (c) warm water (d) sugar
  40. 40.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a balloon (d) a paper clip

Answer key

  1. False
  2. we change it
  3. a paper clip
  4. sugar
  5. False
  6. the amount of yeast
  7. warm water
  8. a paper clip
  9. a magnet
  10. False
  11. False
  12. not needed
  13. True
  14. sunlight
  15. needed
  16. warm water
  17. turmeric powder
  18. we keep it the same
  19. a mirror
  20. yeast needs it
  21. yeast does not need it
  22. a battery cell
  23. False
  24. it grows very little
  25. False
  26. turmeric powder
  27. the balloon is bigger
  28. False
  29. pour it down the sink
  30. the yeast is killed
  31. not needed
  32. time
  33. a tiny living fungus
  34. needed
  35. False
  36. yeast needs it
  37. False
  38. dry yeast
  39. vinegar
  40. a balloon

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