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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 641 · 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.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
  2. 2.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a battery cell (d) sugar
  3. 3.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) a magnet (d) sugar
  4. 4.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
  6. 6.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold
  7. 7.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time
  8. 8.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
  9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
  10. 10.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
  11. 11.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) time (d) vinegar
  12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) dry yeast (d) a comb
  13. 13.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  14. 14.True or false: salt is something yeast does not need. (a) False (b) True
  15. 15.True or false: warm water is something yeast does not need. (a) True (b) False
  16. 16.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) warm water (d) sugar
  17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a magnet (d) sugar
  18. 18.🔍 Which is the odd one out? (a) salt (b) a magnet (c) sugar (d) vinegar
  19. 19.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) air from outside (d) carbon dioxide gas
  20. 20.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) a comb (d) turmeric powder
  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 keep it the same (b) we change it (c) we measure it
  22. 22.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
  23. 23.True or false: warm water is something yeast needs. (a) False (b) True
  24. 24.True or false: a magnet is something yeast does not need. (a) False (b) True
  25. 25.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) a magnet
  26. 26.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down
  27. 27.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it heavy (c) to colour it (d) to make it sweet
  28. 28.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
  29. 29.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it bursts at once (d) it grows very little
  30. 30.True or false: a magnet is something yeast needs. (a) True (b) False
  31. 31.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  32. 32.True or false: sugar is needed for the yeast balloon. (a) False (b) True
  33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
  34. 34.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a balloon (d) a magnet
  35. 35.🔍 Which is the odd one out? (a) time (b) sunlight (c) warm water (d) sugar
  36. 36.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a battery cell (c) warm water (d) a mirror
  37. 37.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a balloon (c) a paper clip (d) a magnet
  38. 38.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) warm water (c) dry yeast (d) sugar
  40. 40.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False

Answer key

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

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