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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 264 · 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 needs? (a) salt (b) warm water (c) a magnet (d) sunlight
  2. 2.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
  3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a mirror (d) a small bottle
  4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
  5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
  6. 6.⚖️ 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
  7. 7.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it shrinks to nothing (d) it turns to bread
  8. 8.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  9. 9.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  10. 10.True or false: a magnet is something yeast needs. (a) True (b) False
  11. 11.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) sugar (c) a small bottle (d) a balloon
  13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a paper clip (c) a small bottle (d) a balloon
  14. 14.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  15. 15.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a paper clip (d) sugar
  16. 16.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a magnet (d) a balloon
  17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
  18. 18.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a comb (c) a paper clip (d) a battery cell
  19. 19.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
  20. 20.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) sugar (d) time
  21. 21.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  22. 22.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) the yeast is killed (d) it glows
  23. 23.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sunlight (d) sugar
  24. 24.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  25. 25.⚖️ 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
  26. 26.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
  27. 27.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  28. 28.⚖️ 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
  29. 29.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  30. 30.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) time (d) salt
  31. 31.🔍 Which is the odd one out? (a) sunlight (b) salt (c) warm water (d) a magnet
  32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a magnet (d) a small bottle
  33. 33.True or false: salt is something yeast needs. (a) False (b) True
  34. 34.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  35. 35.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) steam (d) smoke
  36. 36.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  37. 37.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
  38. 38.⚖️ 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) False (b) True
  39. 39.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) vinegar
  40. 40.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it

Answer key

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

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