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Yeast Balloon Experiment Worksheet

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

Answer key

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

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