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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 655 · 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.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) very salty (d) boiling hot
  2. 2.🔍 Which is the odd one out? (a) salt (b) a magnet (c) sunlight (d) warm water
  3. 3.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
  4. 4.True or false: vinegar is something yeast needs. (a) True (b) False
  5. 5.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) warm water (c) a battery cell (d) a mirror
  6. 6.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it grows very little (d) it bursts at once
  7. 7.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) a magnet (d) salt
  8. 8.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a battery cell (c) warm water (d) a balloon
  9. 9.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  10. 10.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  11. 11.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) time (d) sugar
  12. 12.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a tiny living fungus (d) a kind of sugar
  13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
  14. 14.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  15. 15.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a battery cell (c) a paper clip (d) a comb
  16. 16.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) time (d) sugar
  17. 17.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  18. 18.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  19. 19.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
  20. 20.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
  21. 21.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  22. 22.🍞 Which of these is something yeast needs? (a) warm water (b) a magnet (c) sunlight (d) vinegar
  23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) sugar (d) a comb
  24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
  25. 25.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
  27. 27.🍞 Which of these is something yeast needs? (a) salt (b) time (c) vinegar (d) sunlight
  28. 28.True or false: warm water is something yeast does not need. (a) False (b) True
  29. 29.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to make it sweet (c) it is food for yeast (d) to colour it
  30. 30.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) a paper clip (d) a small bottle
  31. 31.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  32. 32.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) salt (d) warm water
  33. 33.⚖️ 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
  34. 34.True or false: a magnet is something yeast needs. (a) False (b) True
  35. 35.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
  36. 36.⚖️ 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
  37. 37.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to wash dishes (d) to colour rice
  38. 38.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) dry yeast (c) sugar (d) a small bottle
  39. 39.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  40. 40.🔍 Which is the odd one out? (a) a magnet (b) salt (c) time (d) sunlight

Answer key

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

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