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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 204 · 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.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  2. 2.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  3. 3.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) salt (d) sugar
  4. 4.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  5. 5.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) a magnet (d) sugar
  6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a battery cell (d) warm water
  7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
  8. 8.⚖️ 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) True (b) False
  9. 9.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
  10. 10.🍞 Which of these is something yeast needs? (a) warm water (b) vinegar (c) salt (d) sunlight
  11. 11.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
  12. 12.⚖️ 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 keep it the same (b) we measure it (c) we change it
  13. 13.⚖️ 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 yeast (b) the same bottles (c) the water temperature (d) size of the balloon
  14. 14.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a battery cell (c) a balloon (d) a paper clip
  15. 15.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold kills sugar (d) cold makes it pink
  16. 16.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  17. 17.True or false: salt is something yeast needs. (a) False (b) True
  18. 18.⚖️ 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 measure it (b) we change it (c) we keep it the same
  19. 19.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  20. 20.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  21. 21.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  22. 22.⚖️ 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
  23. 23.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it grows very little (d) it bursts at once
  24. 24.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  25. 25.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of stone (d) a kind of salt
  26. 26.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  27. 27.True or false: time is something yeast needs. (a) False (b) True
  28. 28.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of yeast (c) size of the balloon (d) the same bottles
  30. 30.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  31. 31.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a paper clip (c) dry yeast (d) a magnet
  32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a mirror (d) dry yeast
  33. 33.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) a paper clip (d) warm water
  34. 34.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
  35. 35.🔍 Which is the odd one out? (a) sunlight (b) salt (c) vinegar (d) warm water
  36. 36.True or false: sugar is something yeast does not need. (a) True (b) False
  37. 37.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
  38. 38.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  39. 39.🍞 Which of these is something yeast needs? (a) time (b) vinegar (c) salt (d) sunlight
  40. 40.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it

Answer key

  1. not needed
  2. yeast needs it
  3. sugar
  4. True
  5. a magnet
  6. a battery cell
  7. we keep it the same
  8. True
  9. True
  10. warm water
  11. to make bread rise
  12. we measure it
  13. the water temperature
  14. a balloon
  15. cold slows yeast down
  16. not needed
  17. False
  18. we keep it the same
  19. yeast does not need it
  20. yeast does not need it
  21. yeast needs it
  22. False
  23. it grows very little
  24. needed
  25. a tiny living fungus
  26. yeast does not need it
  27. True
  28. needed
  29. size of the balloon
  30. needed
  31. dry yeast
  32. a mirror
  33. warm water
  34. pour it down the sink
  35. warm water
  36. False
  37. False
  38. False
  39. time
  40. yeast needs it

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