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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 154 · 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.True or false: sugar is something yeast does not need. (a) True (b) False
  2. 2.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a mirror (d) a balloon
  3. 3.🛟 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
  4. 4.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
  5. 5.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) sugar (d) warm water
  6. 6.True or false: vinegar is something yeast needs. (a) True (b) False
  7. 7.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
  8. 8.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
  9. 9.🧺 Do we need a battery cell 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? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of yeast
  11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
  12. 12.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
  13. 13.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) dry yeast (d) a comb
  14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a battery cell (c) a balloon (d) dry yeast
  15. 15.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) smoke (d) air from outside
  16. 16.⚖️ 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
  17. 17.True or false: warm water is needed for the yeast balloon. (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.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
  20. 20.True or false: time is something yeast does not need. (a) False (b) True
  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) size of the balloon (b) the amount of water (c) the amount of yeast (d) the water temperature
  22. 22.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
  23. 23.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  24. 24.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) warm water (d) time
  25. 25.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
  26. 26.True or false: salt is something yeast needs. (a) False (b) True
  27. 27.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  28. 28.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  29. 29.🔍 Which is the odd one out? (a) time (b) warm water (c) salt (d) sugar
  30. 30.🔍 Which is the odd one out? (a) sunlight (b) time (c) salt (d) a magnet
  31. 31.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) salt
  32. 32.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) turmeric powder (d) a mirror
  33. 33.🔍 Which is the odd one out? (a) time (b) sunlight (c) warm water (d) sugar
  34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a mirror (d) dry yeast
  35. 35.True or false: sunlight is something yeast does not need. (a) False (b) True
  36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) a small bottle (d) sugar
  37. 37.⚖️ 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 keep it the same (b) we measure it (c) we change it
  38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
  39. 39.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  40. 40.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) a magnet (d) warm water

Answer key

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

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