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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 791 · 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.True or false: sunlight is something yeast needs. (a) True (b) False
  2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) warm water (d) turmeric powder
  3. 3.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  4. 4.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) air from outside (d) steam
  5. 5.⚖️ 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 amount of water (c) the water temperature
  6. 6.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
  7. 7.True or false: sugar is something yeast does not need. (a) False (b) True
  8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a battery cell (d) dry yeast
  9. 9.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  10. 10.True or false: vinegar is something yeast needs. (a) False (b) True
  11. 11.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) it is food for yeast (d) to make it heavy
  12. 12.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it glows (d) it grows faster
  13. 13.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  14. 14.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) sugar (d) warm water
  15. 15.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) warm water (d) salt
  16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) a balloon (c) a small bottle (d) dry yeast
  17. 17.⚖️ 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) False (b) True
  18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a balloon (d) a mirror
  19. 19.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
  20. 20.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it grows very little (d) it turns yellow
  21. 21.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  22. 22.True or false: sugar is something yeast needs. (a) True (b) False
  23. 23.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) a magnet (d) sugar
  24. 24.⚖️ 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 change it (c) we measure it
  25. 25.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) time (d) salt
  26. 26.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  27. 27.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  28. 28.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) a magnet
  29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a balloon (c) dry yeast (d) sugar
  30. 30.🔍 Which is the odd one out? (a) salt (b) time (c) sugar (d) warm water
  31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a balloon (c) warm water (d) a small bottle
  32. 32.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
  33. 33.⚖️ 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 change it (b) we keep it the same (c) we measure it
  34. 34.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) vinegar
  35. 35.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  36. 36.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  37. 37.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it turns to bread (d) it shrinks to nothing
  38. 38.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
  39. 39.⚖️ 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) True (b) False
  40. 40.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False

Answer key

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

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