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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 716 · 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.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  2. 2.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  3. 3.True or false: warm water is something yeast does not need. (a) False (b) True
  4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we measure it (b) we change it (c) we keep it the same
  5. 5.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
  6. 6.⚖️ 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 water temperature (c) the amount of water
  7. 7.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to clean floors (d) to make bread rise
  8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a balloon (d) turmeric powder
  9. 9.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a magnet (d) dry yeast
  10. 10.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) warm water (d) sunlight
  11. 11.🔍 Which is the odd one out? (a) sunlight (b) salt (c) time (d) vinegar
  12. 12.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  13. 13.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
  14. 14.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
  15. 15.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  16. 16.⚖️ 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
  17. 17.True or false: warm water is something yeast needs. (a) True (b) False
  18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a balloon (c) warm water (d) sugar
  19. 19.⚖️ 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 keep it the same (b) we measure it (c) we change it
  20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a paper clip (d) sugar
  21. 21.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
  22. 22.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a kind of sugar (d) a tiny living fungus
  23. 23.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
  24. 24.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) the yeast is killed (d) it glows
  25. 25.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) vinegar
  26. 26.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
  27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
  28. 28.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
  29. 29.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) steam (d) carbon dioxide gas
  30. 30.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
  31. 31.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sunlight (d) time
  32. 32.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
  33. 33.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) a balloon (d) turmeric powder
  34. 34.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  35. 35.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) sugar (d) time
  36. 36.🧺 Do we need warm water 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? True or false: the amount of water is kept the same. (a) False (b) True
  38. 38.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) warm water (d) sugar
  39. 39.⚖️ 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) size of the balloon (c) the amount of water (d) the same bottles
  40. 40.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed

Answer key

  1. yeast needs it
  2. needed
  3. False
  4. we measure it
  5. pour it down the sink
  6. the amount of water
  7. to make bread rise
  8. turmeric powder
  9. a magnet
  10. warm water
  11. time
  12. yeast does not need it
  13. False
  14. False
  15. needed
  16. True
  17. True
  18. a comb
  19. we change it
  20. a paper clip
  21. False
  22. a tiny living fungus
  23. the balloon is bigger
  24. the yeast is killed
  25. vinegar
  26. True
  27. False
  28. warm, not hot
  29. carbon dioxide gas
  30. False
  31. time
  32. False
  33. a balloon
  34. not needed
  35. sunlight
  36. needed
  37. True
  38. turmeric powder
  39. size of the balloon
  40. not needed

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