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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 251 · 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.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  2. 2.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
  3. 3.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold makes it pink (c) cold kills sugar (d) cold water is heavy
  4. 4.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a comb (d) warm water
  5. 5.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) time (d) warm water
  6. 6.True or false: warm water is something yeast needs. (a) False (b) True
  7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
  8. 8.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
  9. 9.⚖️ 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 yeast
  10. 10.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) steam (d) smoke
  11. 11.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a magnet (c) sugar (d) a balloon
  12. 12.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  13. 13.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) sunlight (d) a magnet
  14. 14.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
  15. 15.True or false: salt is something yeast needs. (a) False (b) True
  16. 16.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  17. 17.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
  18. 18.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) vinegar
  19. 19.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  20. 20.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) warm water (c) a comb (d) turmeric powder
  21. 21.⚖️ 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 same bottles (b) the amount of sugar (c) the water temperature (d) the amount of yeast
  22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a paper clip (d) dry yeast
  23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a battery cell (c) a balloon (d) sugar
  24. 24.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
  25. 25.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  26. 26.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
  27. 27.True or false: sugar is something yeast needs. (a) False (b) True
  28. 28.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) to make it heavy (d) it is food for yeast
  29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
  30. 30.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
  32. 32.🧺 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 mirror
  33. 33.⚖️ 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) True (b) False
  34. 34.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  35. 35.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
  36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a magnet (c) dry yeast (d) a small bottle
  37. 37.⚖️ 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
  38. 38.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
  40. 40.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it

Answer key

  1. yeast needs it
  2. True
  3. cold slows yeast down
  4. a comb
  5. a magnet
  6. True
  7. we keep it the same
  8. False
  9. the amount of yeast
  10. carbon dioxide gas
  11. a magnet
  12. not needed
  13. sugar
  14. to make bread rise
  15. False
  16. needed
  17. salt
  18. vinegar
  19. yeast does not need it
  20. warm water
  21. the water temperature
  22. a paper clip
  23. a battery cell
  24. the balloon is bigger
  25. not needed
  26. True
  27. True
  28. it is food for yeast
  29. we keep it the same
  30. yeast does not need it
  31. False
  32. a mirror
  33. False
  34. needed
  35. False
  36. a magnet
  37. True
  38. not needed
  39. False
  40. yeast does not need it

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