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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 121 · 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.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  2. 2.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is bigger (d) the balloon is smaller
  3. 3.🔍 Which is the odd one out? (a) vinegar (b) salt (c) warm water (d) sunlight
  4. 4.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) vinegar (d) a magnet
  5. 5.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
  6. 6.🔮 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
  7. 7.⚖️ 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) True (b) False
  8. 8.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
  9. 9.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  10. 10.🔍 Which is the odd one out? (a) salt (b) sugar (c) time (d) warm water
  11. 11.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  12. 12.⚖️ 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) True (b) False
  13. 13.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a paper clip (d) a small bottle
  14. 14.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) a magnet
  15. 15.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  16. 16.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of sugar (d) a kind of stone
  17. 17.⚖️ 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) True (b) False
  18. 18.⚖️ 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) size of the balloon (c) the water temperature (d) the amount of sugar
  19. 19.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) sugar (d) a magnet
  20. 20.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  21. 21.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  22. 22.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
  23. 23.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
  24. 24.True or false: sugar is something yeast needs. (a) True (b) False
  25. 25.⚖️ 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 change it (c) we keep it the same
  26. 26.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  27. 27.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
  28. 28.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
  29. 29.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
  30. 30.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) time (d) sunlight
  31. 31.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  32. 32.True or false: vinegar is something yeast needs. (a) True (b) False
  33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) dry yeast (d) a magnet
  34. 34.True or false: sunlight is something yeast needs. (a) False (b) True
  35. 35.⚖️ 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 measure it (b) we change it (c) we keep it the same
  36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) warm water (d) a small bottle
  37. 37.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
  38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
  39. 39.⚖️ 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 change it (c) we measure it
  40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True

Answer key

  1. yeast does not need it
  2. the balloon is bigger
  3. warm water
  4. warm water
  5. salt
  6. it grows very little
  7. True
  8. False
  9. needed
  10. salt
  11. yeast does not need it
  12. True
  13. a small bottle
  14. a magnet
  15. yeast needs it
  16. a tiny living fungus
  17. False
  18. size of the balloon
  19. sugar
  20. not needed
  21. not needed
  22. False
  23. cold slows yeast down
  24. True
  25. we change it
  26. not needed
  27. the yeast is killed
  28. False
  29. True
  30. time
  31. needed
  32. False
  33. a magnet
  34. False
  35. we keep it the same
  36. a mirror
  37. False
  38. False
  39. we measure it
  40. False

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