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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 369 · 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) a small bottle (b) sugar (c) a battery cell (d) a balloon
  2. 2.True or false: warm water is something yeast does not need. (a) True (b) False
  3. 3.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
  4. 4.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) sugar (d) a battery cell
  5. 5.🔍 Which is the odd one out? (a) vinegar (b) time (c) warm water (d) sugar
  6. 6.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  7. 7.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
  8. 8.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
  10. 10.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
  11. 11.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a small bottle (d) turmeric powder
  12. 12.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  13. 13.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  14. 14.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold makes it pink (d) cold kills sugar
  15. 15.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  16. 16.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  17. 17.⚖️ 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 yeast (b) the amount of sugar (c) size of the balloon (d) the same bottles
  18. 18.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  19. 19.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) sunlight (d) vinegar
  20. 20.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the same bottles (c) the water temperature
  22. 22.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) warm water (c) a mirror (d) a comb
  23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) size of the balloon (c) the water temperature
  24. 24.True or false: sugar is something yeast needs. (a) False (b) True
  25. 25.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
  26. 26.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) a balloon (d) sugar
  28. 28.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) warm water (d) sugar
  29. 29.⚖️ 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) True (b) False
  30. 30.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) sunlight (d) a magnet
  31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) dry yeast (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 same bottles is kept the same. (a) True (b) False
  33. 33.True or false: a magnet is something yeast needs. (a) True (b) False
  34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of water
  35. 35.🔮 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
  36. 36.⚖️ 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
  37. 37.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) sunlight
  38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) sugar (d) a mirror
  39. 39.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  40. 40.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) sunlight

Answer key

  1. a battery cell
  2. False
  3. carbon dioxide gas
  4. sugar
  5. vinegar
  6. needed
  7. False
  8. needed
  9. pour it down the sink
  10. warm, not hot
  11. a small bottle
  12. False
  13. not needed
  14. cold slows yeast down
  15. yeast needs it
  16. True
  17. size of the balloon
  18. yeast needs it
  19. warm water
  20. False
  21. the same bottles
  22. warm water
  23. the amount of yeast
  24. True
  25. True
  26. not needed
  27. a magnet
  28. salt
  29. False
  30. time
  31. a paper clip
  32. True
  33. False
  34. the amount of water
  35. the yeast is killed
  36. False
  37. sunlight
  38. a mirror
  39. needed
  40. sunlight

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