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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 601 · 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.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  2. 2.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) it turns to bread (d) the balloon is bigger
  3. 3.True or false: salt is something yeast does not need. (a) False (b) True
  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? True or false: the water temperature is the one thing we change. (a) False (b) True
  6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a small bottle (c) warm water (d) a balloon
  7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a magnet (d) a balloon
  8. 8.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  9. 9.True or false: sunlight is something yeast needs. (a) False (b) True
  10. 10.🔍 Which is the odd one out? (a) sugar (b) warm water (c) vinegar (d) time
  11. 11.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  12. 12.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it turns yellow (d) it grows much faster
  13. 13.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
  14. 14.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) throw it at a wall (d) put it in your mouth
  15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) warm water (d) a paper clip
  16. 16.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
  17. 17.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  18. 18.🔮 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
  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) False (b) True
  20. 20.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) a balloon (d) a magnet
  21. 21.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
  22. 22.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) salt (d) sunlight
  23. 23.⚖️ 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
  24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a mirror (c) dry yeast (d) a small bottle
  25. 25.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  26. 26.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  27. 27.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) a magnet (d) warm water
  28. 28.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  29. 29.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
  30. 30.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) sunlight
  31. 31.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) dry yeast (c) a small bottle (d) sugar
  32. 32.True or false: sunlight is something yeast does not need. (a) True (b) False
  33. 33.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
  34. 34.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) a mirror (d) a comb
  35. 35.⚖️ 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 sugar (b) size of the balloon (c) the water temperature (d) the amount of yeast
  36. 36.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
  37. 37.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  38. 38.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) sugar (d) warm water
  39. 39.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  40. 40.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone

Answer key

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

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