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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 753 · 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.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to colour rice (d) to wash dishes
  2. 2.🍞 Which of these is something yeast needs? (a) a magnet (b) sugar (c) salt (d) vinegar
  3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) turmeric powder
  4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) True (b) False
  5. 5.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) a balloon (d) sugar
  6. 6.⚖️ 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
  7. 7.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it glows (d) it grows faster
  8. 8.⚖️ 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) False (b) True
  9. 9.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
  10. 10.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
  11. 11.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) warm water
  12. 12.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
  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.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a magnet (d) dry yeast
  16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) warm water (d) a mirror
  17. 17.True or false: warm water is something yeast does not need. (a) False (b) True
  18. 18.True or false: salt is something yeast needs. (a) True (b) False
  19. 19.⚖️ 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
  20. 20.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  21. 21.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  22. 22.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  23. 23.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  24. 24.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
  25. 25.True or false: sugar is something yeast needs. (a) True (b) False
  26. 26.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) it turns to bread (d) the balloon is bigger
  27. 27.True or false: a magnet is something yeast needs. (a) True (b) False
  28. 28.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  29. 29.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time
  30. 30.True or false: a magnet is something yeast does not need. (a) True (b) False
  31. 31.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  32. 32.⚖️ 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 same bottles
  33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a balloon (d) a comb
  34. 34.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it grows very little (d) it turns yellow
  35. 35.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) carbon dioxide gas (d) smoke
  36. 36.🔍 Which is the odd one out? (a) time (b) sunlight (c) salt (d) vinegar
  37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) the water temperature (c) size of the balloon
  38. 38.🔍 Which is the odd one out? (a) sugar (b) salt (c) time (d) warm water
  39. 39.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) time (d) sugar
  40. 40.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True

Answer key

  1. to make bread rise
  2. sugar
  3. turmeric powder
  4. True
  5. a paper clip
  6. we measure it
  7. the yeast is killed
  8. False
  9. salt
  10. warm, not hot
  11. warm water
  12. False
  13. we keep it the same
  14. False
  15. a magnet
  16. a mirror
  17. False
  18. False
  19. we keep it the same
  20. needed
  21. needed
  22. not needed
  23. yeast needs it
  24. pour it down the sink
  25. True
  26. the balloon is bigger
  27. False
  28. not needed
  29. a magnet
  30. True
  31. needed
  32. the same bottles
  33. a comb
  34. it grows very little
  35. carbon dioxide gas
  36. time
  37. the amount of yeast
  38. salt
  39. vinegar
  40. True

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