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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 181 · 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: warm water is needed for the yeast balloon. (a) False (b) True
  2. 2.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  3. 3.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) warm water (d) salt
  4. 4.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) it grows faster (d) the yeast is killed
  5. 5.🔍 Which is the odd one out? (a) warm water (b) sugar (c) salt (d) time
  6. 6.⚖️ 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
  7. 7.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) a magnet (d) salt
  8. 8.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) dry yeast (d) a mirror
  9. 9.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  10. 10.⚖️ 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
  11. 11.True or false: sunlight is something yeast needs. (a) False (b) True
  12. 12.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  13. 13.🔍 Which is the odd one out? (a) salt (b) a magnet (c) time (d) sunlight
  14. 14.True or false: warm water is something yeast does not need. (a) True (b) False
  15. 15.⚖️ 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 amount of yeast (c) size of the balloon (d) the same bottles
  16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) turmeric powder (c) a balloon (d) a small bottle
  17. 17.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) warm water (c) turmeric powder (d) a paper clip
  18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a mirror (c) dry yeast (d) warm water
  19. 19.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  20. 20.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
  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 amount of water (b) size of the balloon (c) the water temperature (d) the amount of sugar
  22. 22.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
  24. 24.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a tiny living fungus (d) a kind of sugar
  25. 25.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
  27. 27.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
  28. 28.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) keep it for a month (d) throw it at a wall
  29. 29.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) warm water (d) sugar
  31. 31.True or false: vinegar is something yeast needs. (a) True (b) False
  32. 32.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a balloon (d) a magnet
  33. 33.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  34. 34.True or false: vinegar is something yeast does not need. (a) True (b) False
  35. 35.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
  36. 36.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  37. 37.⚖️ 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
  38. 38.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) smoke (d) air from outside
  39. 39.True or false: sugar is something yeast needs. (a) True (b) False
  40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a balloon (d) a comb

Answer key

  1. True
  2. yeast needs it
  3. warm water
  4. the yeast is killed
  5. salt
  6. True
  7. sugar
  8. dry yeast
  9. needed
  10. False
  11. False
  12. not needed
  13. time
  14. False
  15. size of the balloon
  16. turmeric powder
  17. warm water
  18. a mirror
  19. needed
  20. it grows very little
  21. the water temperature
  22. needed
  23. False
  24. a tiny living fungus
  25. not needed
  26. True
  27. cold slows yeast down
  28. pour it down the sink
  29. needed
  30. a mirror
  31. False
  32. a magnet
  33. yeast needs it
  34. True
  35. True
  36. False
  37. True
  38. carbon dioxide gas
  39. True
  40. a comb

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