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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 563 · 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: warm water is something yeast does not need. (a) False (b) True
  2. 2.🔍 Which is the odd one out? (a) a magnet (b) time (c) vinegar (d) sunlight
  3. 3.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  4. 4.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) sugar (d) salt
  5. 5.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  6. 6.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  7. 7.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to wash dishes (d) to colour rice
  8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
  9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
  10. 10.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
  11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) warm water (d) a balloon
  12. 12.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) vinegar (d) a magnet
  13. 13.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  14. 14.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it glows (d) it grows faster
  15. 15.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) salt
  16. 16.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) salt (d) sugar
  17. 17.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a balloon (c) a battery cell (d) a comb
  18. 18.True or false: warm water is needed for the yeast balloon. (a) False (b) True
  19. 19.🔮 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
  20. 20.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a balloon (d) a magnet
  21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a comb (c) sugar (d) dry yeast
  22. 22.⚖️ 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 keep it the same (c) we change it
  23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) True (b) False
  24. 24.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a tiny living fungus (d) a kind of sugar
  25. 25.True or false: a magnet is something yeast does not need. (a) False (b) True
  26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) dry yeast (d) turmeric powder
  27. 27.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  28. 28.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
  29. 29.🍞 Which of these is something yeast does not need? (a) vinegar (b) time (c) sugar (d) warm water
  30. 30.⚖️ 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 keep it the same (c) we change it
  31. 31.True or false: a comb is needed for the yeast balloon. (a) False (b) True
  32. 32.⚖️ 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 change it (c) we keep it the same
  33. 33.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
  34. 34.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) turmeric powder (d) a paper clip
  35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a battery cell (d) dry yeast
  36. 36.🧺 Do we need a mirror 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 what we measure. (a) False (b) True
  38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a mirror (d) a small bottle
  39. 39.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
  40. 40.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) vinegar

Answer key

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

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