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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 493 · 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.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) salt (d) vinegar
  2. 2.🔮 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
  3. 3.⚖️ 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 change it (b) we measure it (c) we keep it the same
  4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it grows very little (d) it turns yellow
  5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) warm water (d) a balloon
  6. 6.True or false: salt is something yeast needs. (a) True (b) False
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a mirror (c) dry yeast (d) warm water
  8. 8.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
  9. 9.🍞 Which of these is something yeast needs? (a) time (b) salt (c) a magnet (d) vinegar
  10. 10.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) vinegar (d) sugar
  11. 11.True or false: time is something yeast needs. (a) False (b) True
  12. 12.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) time (d) warm water
  13. 13.⚖️ 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) size of the balloon (c) the water temperature
  14. 14.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  15. 15.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
  16. 16.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
  17. 17.⚖️ 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) False (b) True
  18. 18.True or false: sunlight is something yeast does not need. (a) False (b) True
  19. 19.True or false: warm water is something yeast does not need. (a) False (b) True
  20. 20.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
  22. 22.True or false: sugar is something yeast does not need. (a) False (b) True
  23. 23.True or false: a magnet is something yeast does not need. (a) True (b) False
  24. 24.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
  25. 25.True or false: vinegar is something yeast needs. (a) False (b) True
  26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a battery cell (d) dry yeast
  27. 27.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  28. 28.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a comb (c) a paper clip (d) a mirror
  29. 29.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a tiny living fungus (d) a kind of salt
  30. 30.⚖️ 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) the amount of yeast (b) the water temperature (c) the amount of sugar (d) the same bottles
  31. 31.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) warm water (d) a comb
  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 water”? (a) we measure it (b) we change it (c) we keep it the same
  34. 34.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to clean floors (d) to colour rice
  35. 35.True or false: sugar is something yeast needs. (a) True (b) False
  36. 36.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
  38. 38.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold makes it pink (d) cold slows yeast down
  39. 39.🍞 Which of these is something yeast needs? (a) warm water (b) a magnet (c) vinegar (d) sunlight
  40. 40.🔍 Which is the odd one out? (a) sunlight (b) salt (c) a magnet (d) time

Answer key

  1. sugar
  2. the balloon is bigger
  3. we change it
  4. it grows very little
  5. a magnet
  6. False
  7. a mirror
  8. pour it down the sink
  9. time
  10. vinegar
  11. True
  12. sunlight
  13. the amount of yeast
  14. needed
  15. salt
  16. yeast needs it
  17. True
  18. True
  19. False
  20. not needed
  21. False
  22. False
  23. True
  24. False
  25. False
  26. a battery cell
  27. yeast needs it
  28. a balloon
  29. a tiny living fungus
  30. the water temperature
  31. yeast needs it
  32. a comb
  33. we keep it the same
  34. to make bread rise
  35. True
  36. not needed
  37. False
  38. cold slows yeast down
  39. warm water
  40. time

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