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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 906 · 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.⚖️ 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
  2. 2.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a magnet (c) a comb (d) a mirror
  3. 3.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
  4. 4.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) time (d) sugar
  5. 5.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
  6. 6.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  7. 7.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) it is food for yeast (d) to make it sweet
  8. 8.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice
  9. 9.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  10. 10.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) a magnet
  11. 11.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) vinegar (d) salt
  12. 12.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) sugar (c) turmeric powder (d) a magnet
  13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) sugar (d) a magnet
  14. 14.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
  16. 16.True or false: salt is something yeast needs. (a) True (b) False
  17. 17.True or false: sugar is something yeast needs. (a) False (b) True
  18. 18.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
  19. 19.True or false: time is something yeast does not need. (a) True (b) False
  20. 20.⚖️ 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
  21. 21.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) salt
  22. 22.🔍 Which is the odd one out? (a) sugar (b) salt (c) warm water (d) time
  23. 23.True or false: warm water is something yeast does not need. (a) False (b) True
  24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) True (b) False
  25. 25.True or false: time is something yeast needs. (a) False (b) True
  26. 26.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) sugar (d) salt
  27. 27.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
  28. 28.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) sugar (d) salt
  29. 29.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it grows faster (d) it turns to sugar
  30. 30.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  31. 31.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) salt (d) warm water
  32. 32.🔍 Which is the odd one out? (a) time (b) a magnet (c) sunlight (d) salt
  33. 33.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
  34. 34.True or false: warm water is needed for the yeast balloon. (a) True (b) False
  35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) warm water (c) a balloon (d) dry yeast
  36. 36.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
  37. 37.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a tiny living fungus (d) a kind of salt
  38. 38.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  39. 39.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) time (d) sugar
  40. 40.🛟 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

Answer key

  1. we keep it the same
  2. a small bottle
  3. True
  4. vinegar
  5. warm, not hot
  6. not needed
  7. it is food for yeast
  8. to make bread rise
  9. needed
  10. a magnet
  11. time
  12. sugar
  13. a magnet
  14. False
  15. True
  16. False
  17. True
  18. False
  19. False
  20. False
  21. salt
  22. salt
  23. False
  24. True
  25. True
  26. sugar
  27. True
  28. sugar
  29. the yeast is killed
  30. needed
  31. warm water
  32. time
  33. False
  34. True
  35. a comb
  36. False
  37. a tiny living fungus
  38. yeast needs it
  39. a magnet
  40. pour it down the sink

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