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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 705 · 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: sugar is something yeast needs. (a) False (b) True
  2. 2.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) salt (d) sugar
  3. 3.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) warm water (d) a magnet
  4. 4.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  5. 5.⚖️ 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 water temperature (b) size of the balloon (c) the amount of water (d) the same bottles
  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 paper clip (d) a balloon
  7. 7.🍞 Why do we add sugar to the yeast? (a) to colour it (b) it is food for yeast (c) to make it sweet (d) to make it heavy
  8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) sugar (d) warm water
  9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
  10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) dry yeast (c) a small bottle (d) warm water
  11. 11.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) it turns to bread (d) the balloon is smaller
  12. 12.True or false: a magnet is something yeast does not need. (a) False (b) True
  13. 13.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) a magnet (d) sunlight
  14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
  15. 15.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) sugar (d) warm water
  16. 16.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
  17. 17.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
  18. 18.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of stone (d) a kind of sugar
  19. 19.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) warm water (d) a battery cell
  20. 20.🔍 Which is the odd one out? (a) salt (b) vinegar (c) sunlight (d) warm water
  21. 21.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a battery cell (c) a mirror (d) a magnet
  22. 22.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  23. 23.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
  24. 24.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) sunlight
  25. 25.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) warm water (d) a mirror
  26. 26.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  27. 27.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
  28. 28.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
  29. 29.True or false: warm water is something yeast needs. (a) False (b) True
  30. 30.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  31. 31.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a battery cell (d) a balloon
  32. 32.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
  33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) a comb (d) warm water
  34. 34.⚖️ 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
  35. 35.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  36. 36.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  37. 37.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of water (c) the amount of sugar (d) the amount of yeast
  39. 39.⚖️ 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
  40. 40.True or false: sugar is needed for the yeast balloon. (a) False (b) True

Answer key

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

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