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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 876 · 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 not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) warm water (d) a magnet
  2. 2.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  3. 3.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
  4. 4.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
  5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
  6. 6.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
  7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
  8. 8.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sunlight (d) warm water
  9. 9.⚖️ 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) the amount of water (c) the amount of sugar (d) the water temperature
  10. 10.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) a battery cell (d) dry yeast
  11. 11.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  12. 12.True or false: salt is something yeast needs. (a) False (b) True
  13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a comb (d) a balloon
  14. 14.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
  15. 15.⚖️ 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) False (b) True
  16. 16.🛟 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
  17. 17.🔍 Which is the odd one out? (a) a magnet (b) salt (c) sugar (d) sunlight
  18. 18.⚖️ 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
  19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
  20. 20.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) vinegar
  21. 21.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  22. 22.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
  23. 23.True or false: sugar is something yeast needs. (a) False (b) True
  24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a magnet (c) a balloon (d) dry yeast
  25. 25.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) a magnet (d) a comb
  26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
  27. 27.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
  28. 28.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) air from outside (d) smoke
  29. 29.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of salt (d) a kind of stone
  30. 30.True or false: sunlight is something yeast does not need. (a) False (b) True
  31. 31.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  32. 32.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  33. 33.🔍 Which is the odd one out? (a) sugar (b) time (c) vinegar (d) warm water
  34. 34.True or false: warm water is something yeast does not need. (a) True (b) False
  35. 35.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) sugar (d) time
  36. 36.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a comb (c) dry yeast (d) a balloon
  37. 37.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
  38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of sugar (b) the water temperature (c) the same bottles (d) size of the balloon
  39. 39.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) warm water (d) sugar
  40. 40.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) sugar (d) a battery cell

Answer key

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

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