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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 322 · 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.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
  2. 2.⚖️ 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
  3. 3.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) a magnet
  4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
  5. 5.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) warm water (d) time
  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 sugar”? (a) we keep it the same (b) we measure it (c) we change it
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) warm water (d) a magnet
  8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) dry yeast (c) sugar (d) a small bottle
  9. 9.🔍 Which is the odd one out? (a) salt (b) a magnet (c) vinegar (d) sugar
  10. 10.True or false: salt is something yeast needs. (a) False (b) True
  11. 11.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) vinegar (d) a magnet
  12. 12.True or false: sunlight is something yeast needs. (a) True (b) False
  13. 13.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  14. 14.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  15. 15.True or false: warm water is something yeast does not need. (a) True (b) False
  16. 16.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  17. 17.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a paper clip (d) a balloon
  18. 18.True or false: time is something yeast does not need. (a) True (b) False
  19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) False (b) True
  20. 20.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
  21. 21.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
  22. 22.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a comb (d) a small bottle
  23. 23.🔍 Which is the odd one out? (a) time (b) sunlight (c) warm water (d) sugar
  24. 24.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
  25. 25.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  26. 26.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
  27. 27.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it heavy (c) to colour it (d) to make it sweet
  28. 28.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
  30. 30.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  31. 31.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of salt (d) a kind of stone
  32. 32.True or false: a magnet is something yeast needs. (a) False (b) True
  33. 33.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  34. 34.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) dry yeast (c) a paper clip (d) turmeric powder
  35. 35.⚖️ 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) False (b) True
  36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
  37. 37.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows much faster (d) it grows very little
  38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of sugar (b) the water temperature (c) the amount of water (d) the amount of yeast
  39. 39.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  40. 40.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed

Answer key

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

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