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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 746 · 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.⚖️ 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 change it (c) we measure it
  2. 2.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) the yeast is killed (d) it turns to sugar
  3. 3.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  4. 4.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) time (d) vinegar
  5. 5.🔍 Which is the odd one out? (a) salt (b) a magnet (c) time (d) sunlight
  6. 6.⚖️ 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 yeast
  7. 7.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
  8. 8.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) vinegar (d) a magnet
  9. 9.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold water is heavy (d) cold slows yeast down
  10. 10.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
  11. 11.True or false: salt is something yeast does not need. (a) False (b) True
  12. 12.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  13. 13.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) warm water (d) turmeric powder
  14. 14.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) it shrinks to nothing (d) the balloon is bigger
  15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a mirror (d) dry yeast
  16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) dry yeast (d) a magnet
  17. 17.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a paper clip (d) a balloon
  18. 18.⚖️ 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 measure it (c) we change it
  19. 19.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to colour rice (d) to clean floors
  20. 20.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to colour it (c) to make it sweet (d) to make it heavy
  21. 21.True or false: vinegar is something yeast needs. (a) True (b) False
  22. 22.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of salt (d) a kind of stone
  23. 23.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
  24. 24.⚖️ 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) the same bottles (c) size of the balloon
  25. 25.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) warm water (d) a mirror
  26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
  27. 27.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
  28. 28.True or false: warm water is something yeast needs. (a) True (b) False
  29. 29.True or false: warm water is something yeast does not need. (a) True (b) False
  30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
  31. 31.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) dry yeast (d) a comb
  32. 32.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  33. 33.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
  34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a comb (c) a small bottle (d) warm water
  35. 35.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) a magnet
  36. 36.True or false: sugar is something yeast does not need. (a) True (b) False
  37. 37.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) time (d) sugar
  38. 38.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) sunlight (d) salt
  39. 39.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) a magnet (d) warm water
  40. 40.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed

Answer key

  1. we measure it
  2. the yeast is killed
  3. not needed
  4. time
  5. time
  6. the water temperature
  7. False
  8. warm water
  9. cold slows yeast down
  10. pour it down the sink
  11. True
  12. not needed
  13. turmeric powder
  14. the balloon is bigger
  15. a mirror
  16. a magnet
  17. a balloon
  18. we change it
  19. to make bread rise
  20. it is food for yeast
  21. False
  22. a tiny living fungus
  23. warm, not hot
  24. the same bottles
  25. warm water
  26. False
  27. False
  28. True
  29. False
  30. we keep it the same
  31. a comb
  32. not needed
  33. True
  34. a comb
  35. a magnet
  36. False
  37. sunlight
  38. sugar
  39. warm water
  40. not needed

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