← Yeast balloon lesson New set →

Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 797 · 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.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) dry yeast (d) warm water
  2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a magnet (d) a small bottle
  3. 3.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) ice cold (d) very salty
  4. 4.⚖️ 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) False (b) True
  5. 5.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a comb (c) a battery cell (d) a balloon
  6. 6.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a comb (c) a mirror (d) a magnet
  7. 7.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) a magnet (d) sugar
  8. 8.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  9. 9.⚖️ 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 measure it (b) we change it (c) we keep it the same
  10. 10.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold kills sugar (d) cold makes it pink
  11. 11.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) carbon dioxide gas (d) smoke
  12. 12.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  13. 13.⚖️ 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
  14. 14.⚖️ 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 keep it the same (b) we measure it (c) we change it
  15. 15.⚖️ 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
  16. 16.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  17. 17.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  18. 18.True or false: sunlight is something yeast does not need. (a) True (b) False
  19. 19.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) warm water (d) a paper clip
  21. 21.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) a magnet (d) salt
  22. 22.🍞 Which of these is something yeast does not need? (a) warm water (b) vinegar (c) sugar (d) time
  23. 23.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) time (d) a magnet
  24. 24.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
  25. 25.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a battery cell (d) a mirror
  26. 26.True or false: vinegar is something yeast needs. (a) True (b) False
  27. 27.🔍 Which is the odd one out? (a) time (b) vinegar (c) sugar (d) warm water
  28. 28.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
  29. 29.True or false: sugar is something yeast needs. (a) False (b) True
  30. 30.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
  31. 31.🧺 Do we need warm water 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? True or false: size of the balloon is kept the same. (a) False (b) True
  33. 33.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) warm water (d) vinegar
  34. 34.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster
  35. 35.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) it is food for yeast (d) to make it sweet
  36. 36.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) salt
  37. 37.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
  38. 38.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
  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) size of the balloon (b) the amount of sugar (c) the same bottles (d) the water temperature
  40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of water

Answer key

  1. a paper clip
  2. a magnet
  3. warm, not hot
  4. True
  5. a balloon
  6. warm water
  7. a magnet
  8. yeast needs it
  9. we change it
  10. cold slows yeast down
  11. carbon dioxide gas
  12. yeast needs it
  13. True
  14. we keep it the same
  15. the amount of sugar
  16. needed
  17. needed
  18. True
  19. not needed
  20. a paper clip
  21. warm water
  22. vinegar
  23. time
  24. True
  25. dry yeast
  26. False
  27. vinegar
  28. salt
  29. True
  30. False
  31. needed
  32. False
  33. warm water
  34. the yeast is killed
  35. it is food for yeast
  36. salt
  37. False
  38. a magnet
  39. size of the balloon
  40. the amount of water

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids