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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 888 · 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.

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  1. 1.🍞 Which of these is something yeast does not need? (a) sugar (b) sunlight (c) time (d) warm water
  2. 2.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sunlight (d) warm water
  3. 3.⚖️ 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 keep it the same (b) we measure it (c) we change it
  4. 4.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
  5. 5.True or false: warm water is something yeast needs. (a) False (b) True
  6. 6.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it glows (d) it turns to sugar
  7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
  8. 8.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) a battery cell (d) a small bottle
  9. 9.True or false: sugar is something yeast does not need. (a) False (b) True
  10. 10.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
  11. 11.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  12. 12.True or false: sugar is something yeast needs. (a) False (b) True
  13. 13.⚖️ 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
  14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
  15. 15.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) it is food for yeast (c) to colour it (d) to make it heavy
  16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) dry yeast (d) a comb
  17. 17.True or false: time is something yeast does not need. (a) False (b) True
  18. 18.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  19. 19.⚖️ 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 same bottles
  20. 20.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  21. 21.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) warm water (d) a balloon
  22. 22.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
  23. 23.True or false: vinegar is something yeast does not need. (a) True (b) False
  24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a small bottle (d) a magnet
  25. 25.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
  26. 26.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) time (d) a magnet
  27. 27.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  28. 28.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it grows very little (d) it turns yellow
  29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a mirror (d) a balloon
  30. 30.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
  31. 31.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
  33. 33.⚖️ 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 sugar (b) the water temperature (c) the amount of yeast (d) size of the balloon
  34. 34.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold slows yeast down (d) cold water is heavy
  35. 35.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a balloon (c) a battery cell (d) a magnet
  36. 36.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a paper clip (d) sugar
  37. 37.True or false: sugar is needed for the yeast balloon. (a) False (b) True
  38. 38.True or false: vinegar is something yeast needs. (a) False (b) True
  39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a battery cell (d) warm water
  40. 40.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True

Answer key

  1. sunlight
  2. warm water
  3. we measure it
  4. warm, not hot
  5. True
  6. the yeast is killed
  7. we change it
  8. a battery cell
  9. False
  10. False
  11. not needed
  12. True
  13. False
  14. False
  15. it is food for yeast
  16. a comb
  17. False
  18. needed
  19. the same bottles
  20. False
  21. a paper clip
  22. False
  23. True
  24. a magnet
  25. True
  26. time
  27. yeast needs it
  28. it grows very little
  29. a mirror
  30. pour it down the sink
  31. not needed
  32. True
  33. size of the balloon
  34. cold slows yeast down
  35. a balloon
  36. sugar
  37. True
  38. False
  39. a battery cell
  40. True

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