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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 82 · 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.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  2. 2.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) salt (d) sunlight
  3. 3.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
  5. 5.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
  6. 6.True or false: sugar is something yeast needs. (a) False (b) True
  7. 7.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
  8. 8.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  9. 9.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
  10. 10.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) carbon dioxide gas (d) air from outside
  11. 11.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) vinegar (d) warm water
  12. 12.🍞 Why do we add sugar to the yeast? (a) to colour it (b) it is food for yeast (c) to make it heavy (d) to make it sweet
  13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a battery cell (c) sugar (d) warm water
  14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) dry yeast (d) warm water
  15. 15.⚖️ 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
  16. 16.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) turmeric powder (d) dry yeast
  17. 17.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  18. 18.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  19. 19.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
  20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) sugar (d) turmeric powder
  21. 21.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  22. 22.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
  23. 23.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a small bottle (d) a magnet
  24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a mirror (d) dry yeast
  25. 25.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) salt (d) sunlight
  26. 26.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a tiny living fungus (d) a kind of salt
  27. 27.🔍 Which is the odd one out? (a) time (b) warm water (c) vinegar (d) sugar
  28. 28.⚖️ 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 keep it the same (c) we change it
  29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
  30. 30.🍞 Which of these is something yeast does not need? (a) a magnet (b) sugar (c) time (d) warm water
  31. 31.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  32. 32.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
  33. 33.🔮 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
  34. 34.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) very salty (d) boiling hot
  35. 35.⚖️ 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 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 water temperature is the one thing we change. (a) False (b) True
  37. 37.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) sugar (c) a mirror (d) a paper clip
  38. 38.True or false: sunlight is something yeast needs. (a) True (b) False
  39. 39.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  40. 40.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) sunlight (d) warm water

Answer key

  1. yeast does not need it
  2. sugar
  3. yeast needs it
  4. we keep it the same
  5. False
  6. True
  7. False
  8. needed
  9. True
  10. carbon dioxide gas
  11. vinegar
  12. it is food for yeast
  13. a battery cell
  14. a paper clip
  15. we measure it
  16. dry yeast
  17. needed
  18. not needed
  19. not needed
  20. turmeric powder
  21. needed
  22. salt
  23. a small bottle
  24. a mirror
  25. warm water
  26. a tiny living fungus
  27. vinegar
  28. we keep it the same
  29. we keep it the same
  30. a magnet
  31. yeast does not need it
  32. True
  33. the balloon is bigger
  34. warm, not hot
  35. we change it
  36. True
  37. sugar
  38. False
  39. not needed
  40. sunlight

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