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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 155 · 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.True or false: salt is something yeast needs. (a) True (b) False
  2. 2.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) it shrinks to nothing (d) the balloon is smaller
  3. 3.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time
  4. 4.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  5. 5.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a small bottle (c) warm water (d) sugar
  7. 7.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
  8. 8.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) dry yeast (d) a magnet
  9. 9.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a magnet (d) a balloon
  11. 11.⚖️ 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 change it (c) we measure it
  12. 12.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of sugar (d) a kind of stone
  13. 13.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) it is food for yeast (c) to make it heavy (d) to colour it
  14. 14.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  15. 15.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
  16. 16.⚖️ 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) False (b) True
  17. 17.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) sunlight (d) time
  18. 18.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
  19. 19.True or false: a comb is needed for the yeast balloon. (a) False (b) True
  20. 20.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
  21. 21.⚖️ 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
  22. 22.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) a magnet (d) dry yeast
  23. 23.🔍 Which is the odd one out? (a) salt (b) vinegar (c) time (d) sunlight
  24. 24.🍞 Which of these is something yeast needs? (a) warm water (b) vinegar (c) salt (d) a magnet
  25. 25.True or false: time is something yeast needs. (a) True (b) False
  26. 26.True or false: sunlight is something yeast needs. (a) False (b) True
  27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) a small bottle (c) sugar (d) dry yeast
  28. 28.True or false: vinegar is something yeast needs. (a) False (b) True
  29. 29.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a mirror (c) a magnet (d) a comb
  30. 30.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) vinegar (d) time
  31. 31.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold slows yeast down (d) cold kills sugar
  32. 32.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
  33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) warm water (d) a mirror
  34. 34.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) vinegar (d) time
  35. 35.⚖️ 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 yeast (b) size of the balloon (c) the amount of sugar (d) the water temperature
  36. 36.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  37. 37.⚖️ 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
  38. 38.⚖️ 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
  39. 39.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  40. 40.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True

Answer key

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

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