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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 87 · 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.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  2. 2.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
  3. 3.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) dry yeast (c) warm water (d) a small bottle
  4. 4.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) ice cold (d) very salty
  5. 5.⚖️ 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 change it (c) we keep it the same
  6. 6.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) time (d) sugar
  7. 7.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) it is food for yeast (d) to make it heavy
  8. 8.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) time (d) salt
  9. 9.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) sunlight
  10. 10.🔮 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
  11. 11.True or false: sugar is needed for the yeast balloon. (a) True (b) False
  12. 12.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  13. 13.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) sugar (d) time
  14. 14.⚖️ 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 same bottles (b) the water temperature (c) the amount of yeast (d) the amount of water
  15. 15.True or false: sunlight is something yeast needs. (a) True (b) False
  16. 16.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) throw it at a wall (d) put it in your mouth
  17. 17.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) a comb (d) a mirror
  18. 18.⚖️ 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 change it (b) we keep it the same (c) we measure it
  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.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
  21. 21.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) carbon dioxide gas (d) air from outside
  22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a small bottle (d) a battery cell
  23. 23.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
  24. 24.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) the balloon is smaller (d) it turns to bread
  25. 25.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
  27. 27.⚖️ 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) True (b) False
  28. 28.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
  29. 29.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  30. 30.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  31. 31.True or false: sunlight is something yeast does not need. (a) False (b) True
  32. 32.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
  33. 33.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
  34. 34.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sunlight (d) time
  35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) the water temperature (c) size of the balloon
  36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a paper clip (c) dry yeast (d) sugar
  37. 37.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of stone (d) a kind of sugar
  38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) sugar (d) a mirror
  39. 39.🔍 Which is the odd one out? (a) salt (b) time (c) warm water (d) sugar
  40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a comb (d) dry yeast

Answer key

  1. yeast needs it
  2. not needed
  3. a mirror
  4. warm, not hot
  5. we change it
  6. a magnet
  7. it is food for yeast
  8. time
  9. sunlight
  10. the yeast is killed
  11. True
  12. needed
  13. salt
  14. the water temperature
  15. False
  16. pour it down the sink
  17. sugar
  18. we keep it the same
  19. True
  20. needed
  21. carbon dioxide gas
  22. a battery cell
  23. True
  24. the balloon is bigger
  25. needed
  26. we keep it the same
  27. True
  28. False
  29. not needed
  30. not needed
  31. True
  32. not needed
  33. False
  34. time
  35. the amount of yeast
  36. a paper clip
  37. a tiny living fungus
  38. a mirror
  39. salt
  40. a comb

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