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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 358 · 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.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) it grows faster (d) the yeast is killed
  2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a small bottle (d) a magnet
  3. 3.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) dry yeast (c) sugar (d) a balloon
  4. 4.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  5. 5.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
  6. 6.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
  7. 7.🔍 Which is the odd one out? (a) warm water (b) salt (c) time (d) sugar
  8. 8.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) a paper clip (d) warm water
  10. 10.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
  11. 11.True or false: a magnet is something yeast needs. (a) False (b) True
  12. 12.⚖️ 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
  13. 13.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
  14. 14.🔍 Which is the odd one out? (a) vinegar (b) salt (c) sunlight (d) sugar
  15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a mirror (d) a small bottle
  16. 16.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  17. 17.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold water is heavy (d) cold slows yeast down
  18. 18.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) vinegar
  19. 19.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a paper clip (d) dry yeast
  20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of yeast (b) the amount of sugar (c) the water temperature (d) size of the balloon
  21. 21.🔮 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
  22. 22.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) a small bottle (d) a magnet
  23. 23.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
  24. 24.True or false: sunlight is something yeast needs. (a) True (b) False
  25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) turmeric powder (d) a balloon
  26. 26.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a comb (c) a small bottle (d) sugar
  27. 27.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  28. 28.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  29. 29.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) vinegar (d) time
  30. 30.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) salt (d) a magnet
  31. 31.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  32. 32.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  33. 33.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
  35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
  36. 36.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) sunlight
  37. 37.🍞 Which of these is something yeast needs? (a) warm water (b) a magnet (c) vinegar (d) salt
  38. 38.True or false: vinegar is something yeast does not need. (a) True (b) False
  39. 39.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) time (d) sugar
  40. 40.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) salt (d) sugar

Answer key

  1. the yeast is killed
  2. a magnet
  3. a mirror
  4. yeast needs it
  5. yeast does not need it
  6. yeast does not need it
  7. salt
  8. True
  9. a paper clip
  10. pour it down the sink
  11. False
  12. we keep it the same
  13. warm, not hot
  14. sugar
  15. a mirror
  16. not needed
  17. cold slows yeast down
  18. vinegar
  19. dry yeast
  20. size of the balloon
  21. it grows very little
  22. a magnet
  23. a tiny living fungus
  24. False
  25. turmeric powder
  26. a comb
  27. not needed
  28. not needed
  29. time
  30. sugar
  31. not needed
  32. yeast needs it
  33. False
  34. a magnet
  35. True
  36. sunlight
  37. warm water
  38. True
  39. sunlight
  40. salt

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