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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 55 · 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.⚖️ 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 keep it the same (c) we change it
  2. 2.True or false: warm water is needed for the yeast balloon. (a) True (b) False
  3. 3.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a small bottle (c) turmeric powder (d) dry yeast
  4. 4.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
  5. 5.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
  6. 6.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  7. 7.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  8. 8.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to colour rice (d) to clean floors
  9. 9.⚖️ 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) size of the balloon (b) the water temperature (c) the amount of sugar (d) the amount of yeast
  10. 10.⚖️ 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
  11. 11.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  12. 12.🔍 Which is the odd one out? (a) salt (b) a magnet (c) vinegar (d) sugar
  13. 13.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  14. 14.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) air from outside (d) steam
  15. 15.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
  16. 16.True or false: salt is something yeast does not need. (a) False (b) True
  17. 17.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a mirror (d) a small bottle
  18. 18.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
  19. 19.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  20. 20.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) it is food for yeast (d) to make it heavy
  21. 21.⚖️ 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
  22. 22.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  23. 23.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) warm water (c) a balloon (d) sugar
  24. 24.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  25. 25.🍞 Which of these is something yeast does not need? (a) sunlight (b) warm water (c) time (d) sugar
  26. 26.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
  27. 27.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
  28. 28.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of salt (d) a kind of sugar
  29. 29.🧺 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) sugar
  30. 30.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
  31. 31.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
  32. 32.🔍 Which is the odd one out? (a) time (b) vinegar (c) sugar (d) warm water
  33. 33.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
  34. 34.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) sunlight (d) salt
  35. 35.⚖️ 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 water (b) size of the balloon (c) the water temperature
  36. 36.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
  37. 37.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a magnet (d) warm water
  39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of water (c) the amount of yeast (d) size of the balloon
  40. 40.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed

Answer key

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

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