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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 836 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a paper clip (c) warm water (d) sugar
  2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a mirror (c) a balloon (d) a small bottle
  3. 3.🔮 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
  4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a small bottle (d) turmeric powder
  5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
  6. 6.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  7. 7.True or false: warm water is something yeast does not need. (a) True (b) False
  8. 8.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  9. 9.🔍 Which is the odd one out? (a) a magnet (b) time (c) vinegar (d) salt
  10. 10.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sunlight (d) time
  11. 11.True or false: vinegar is something yeast needs. (a) False (b) True
  12. 12.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
  13. 13.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  14. 14.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) sugar (d) a comb
  15. 15.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) warm water (d) a paper clip
  16. 16.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
  17. 17.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  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 water temperature (b) the same bottles (c) size of the balloon (d) the amount of water
  19. 19.🍞 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
  20. 20.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
  21. 21.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  22. 22.⚖️ 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) True (b) False
  23. 23.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) salt (d) sugar
  24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) a balloon (d) sugar
  25. 25.⚖️ 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 change it (b) we measure it (c) we keep it the same
  26. 26.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
  27. 27.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  28. 28.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of sugar (d) a kind of salt
  29. 29.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  30. 30.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  31. 31.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) turmeric powder (d) a paper clip
  32. 32.⚖️ 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) False (b) True
  33. 33.🔮 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
  34. 34.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  35. 35.True or false: salt is something yeast does not need. (a) True (b) False
  36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
  37. 37.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
  38. 38.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) vinegar (d) warm water
  39. 39.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
  40. 40.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a comb (c) a mirror (d) a magnet

Answer key

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

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