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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 596 · 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.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
  2. 2.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) time (d) vinegar
  3. 3.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) a magnet (d) time
  4. 4.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  5. 5.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) a magnet (d) dry yeast
  6. 6.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
  8. 8.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) the yeast is killed (d) it grows faster
  9. 9.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  10. 10.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  11. 11.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  12. 12.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
  13. 13.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) the balloon is bigger (d) it shrinks to nothing
  14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) sugar (d) a mirror
  15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a small bottle (d) a comb
  16. 16.⚖️ 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 amount of water (d) the water temperature
  17. 17.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
  18. 18.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  19. 19.⚖️ 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 change it (b) we measure it (c) we keep it the same
  20. 20.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
  21. 21.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) a magnet (d) a balloon
  22. 22.🔍 Which is the odd one out? (a) sugar (b) salt (c) warm water (d) time
  23. 23.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  24. 24.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) a magnet (d) vinegar
  25. 25.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) time (d) sugar
  26. 26.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
  28. 28.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold water is heavy (d) cold slows yeast down
  29. 29.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) time (d) vinegar
  30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) sugar (d) warm water
  31. 31.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
  32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a battery cell (d) a small bottle
  33. 33.True or false: vinegar 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? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
  35. 35.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  36. 36.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  37. 37.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  38. 38.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  39. 39.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
  40. 40.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) sugar (d) warm water

Answer key

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

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