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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 494 · 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.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  2. 2.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  3. 3.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) time (d) sugar
  4. 4.True or false: sugar is something yeast does not need. (a) False (b) True
  5. 5.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  6. 6.⚖️ 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 keep it the same (b) we change it (c) we measure it
  7. 7.🔍 Which is the odd one out? (a) salt (b) vinegar (c) warm water (d) sunlight
  8. 8.True or false: vinegar is something yeast does not need. (a) False (b) True
  9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) dry yeast (d) a small bottle
  10. 10.True or false: vinegar is something yeast needs. (a) False (b) True
  11. 11.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) time (d) sugar
  12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a battery cell (c) dry yeast (d) sugar
  13. 13.🛟 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
  14. 14.True or false: sugar is something yeast needs. (a) True (b) False
  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 balloon
  16. 16.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) vinegar
  17. 17.True or false: warm water is needed for the yeast balloon. (a) True (b) False
  18. 18.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to clean floors (d) to colour rice
  19. 19.⚖️ 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
  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 sugar (b) the same bottles (c) the water temperature (d) size of the balloon
  21. 21.⚖️ 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 water temperature (b) the amount of yeast (c) the amount of sugar (d) size of the balloon
  22. 22.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) turmeric powder (c) a balloon (d) sugar
  23. 23.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) ice cold (d) very salty
  24. 24.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
  25. 25.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
  26. 26.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) time (d) sunlight
  27. 27.True or false: a magnet is something yeast needs. (a) True (b) False
  28. 28.🔍 Which is the odd one out? (a) time (b) salt (c) sugar (d) warm water
  29. 29.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
  30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
  31. 31.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
  32. 32.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a paper clip (c) a small bottle (d) sugar
  33. 33.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) to make it heavy (d) it is food for yeast
  34. 34.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a kind of salt (d) a tiny living fungus
  35. 35.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a magnet (c) a comb (d) a paper clip
  36. 36.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a paper clip (d) turmeric powder
  37. 37.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
  38. 38.🔮 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
  39. 39.🍞 Which of these is something yeast needs? (a) vinegar (b) warm water (c) a magnet (d) salt
  40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) warm water (c) a balloon (d) dry yeast

Answer key

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

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