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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 102 · 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 does not need. (a) False (b) True
  2. 2.🔍 Which is the odd one out? (a) a magnet (b) time (c) sugar (d) warm water
  3. 3.⚖️ 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
  4. 4.True or false: warm water is something yeast needs. (a) True (b) False
  5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) True (b) False
  6. 6.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) salt
  7. 7.True or false: sugar is something yeast does not need. (a) False (b) True
  8. 8.True or false: time is something yeast does not need. (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) the water temperature (b) size of the balloon (c) the amount of sugar
  10. 10.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a magnet (d) dry yeast
  11. 11.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) dry yeast (c) sugar (d) warm water
  12. 12.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
  13. 13.⚖️ 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 keep it the same (c) we change it
  14. 14.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
  15. 15.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  16. 16.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  17. 17.True or false: sugar is needed for the yeast balloon. (a) True (b) False
  18. 18.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a balloon (d) a magnet
  19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
  20. 20.🧺 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
  21. 21.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
  22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) sugar (d) a comb
  23. 23.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it sweet (c) to colour it (d) to make it heavy
  24. 24.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) time (d) sunlight
  25. 25.🔍 Which is the odd one out? (a) warm water (b) salt (c) vinegar (d) sunlight
  26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) warm water (d) a mirror
  27. 27.🔍 Which is the odd one out? (a) sugar (b) warm water (c) salt (d) time
  28. 28.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  29. 29.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
  30. 30.True or false: vinegar is something yeast needs. (a) True (b) False
  31. 31.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold makes it pink (d) cold slows yeast down
  32. 32.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  33. 33.⚖️ 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
  34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) sugar (d) turmeric powder
  35. 35.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
  36. 36.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
  37. 37.⚖️ 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) the same bottles (c) the water temperature (d) size of the balloon
  38. 38.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  39. 39.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
  40. 40.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) sugar (d) a paper clip

Answer key

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

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