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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 537 · 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: sugar is needed for the yeast balloon. (a) False (b) True
  2. 2.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a balloon (c) sugar (d) dry yeast
  4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) sugar (d) a battery cell
  5. 5.⚖️ 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) size of the balloon (b) the same bottles (c) the amount of sugar (d) the water temperature
  6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) warm water (c) dry yeast (d) a balloon
  7. 7.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) turmeric powder (c) sugar (d) a balloon
  8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a balloon (d) a comb
  9. 9.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of salt (d) a kind of stone
  10. 10.⚖️ 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 measure it (b) we keep it the same (c) we change it
  11. 11.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
  12. 12.True or false: warm water is needed for the yeast balloon. (a) True (b) False
  13. 13.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) dry yeast (c) a magnet (d) a comb
  14. 14.True or false: salt is something yeast does not need. (a) True (b) False
  15. 15.⚖️ 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
  16. 16.True or false: a magnet is something yeast does not need. (a) False (b) True
  17. 17.True or false: sugar is something yeast does not need. (a) True (b) False
  18. 18.⚖️ 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
  19. 19.⚖️ 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) True (b) False
  20. 20.True or false: vinegar is something yeast needs. (a) False (b) True
  21. 21.🔍 Which is the odd one out? (a) sugar (b) salt (c) time (d) warm water
  22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a magnet (d) warm water
  23. 23.True or false: warm water is something yeast does not need. (a) True (b) False
  24. 24.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
  25. 25.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) steam (d) air from outside
  26. 26.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
  27. 27.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
  28. 28.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
  29. 29.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) salt (d) sugar
  30. 30.⚖️ 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) True (b) False
  31. 31.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
  32. 32.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold slows yeast down (d) cold water is heavy
  33. 33.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) sunlight (d) warm water
  34. 34.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sugar (d) sunlight
  35. 35.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
  36. 36.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) time (d) salt
  37. 37.⚖️ 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
  38. 38.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to colour rice (d) to make bread rise
  39. 39.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it grows faster (d) it turns to sugar
  40. 40.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False

Answer key

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

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