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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 47 · 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.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) very salty (d) boiling hot
  2. 2.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  3. 3.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) sugar (d) a magnet
  4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a balloon (c) warm water (d) dry yeast
  5. 5.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  6. 6.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) warm water (d) a magnet
  7. 7.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of salt (d) a kind of stone
  8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
  9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
  10. 10.⚖️ 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) True (b) False
  11. 11.🔮 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
  12. 12.⚖️ 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 sugar (c) the amount of water (d) the same bottles
  13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a balloon (d) turmeric powder
  14. 14.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  15. 15.True or false: sunlight is something yeast needs. (a) False (b) True
  16. 16.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a paper clip (c) a battery cell (d) a magnet
  17. 17.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold slows yeast down (d) cold makes it pink
  18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) sugar (d) a comb
  19. 19.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  20. 20.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
  21. 21.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) sugar (d) a magnet
  22. 22.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
  23. 23.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a small bottle (d) a mirror
  24. 24.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
  25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) dry yeast (d) warm water
  26. 26.⚖️ 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
  27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a small bottle (d) a mirror
  28. 28.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  29. 29.🔍 Which is the odd one out? (a) time (b) salt (c) warm water (d) sugar
  30. 30.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a balloon (c) turmeric powder (d) a battery cell
  31. 31.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
  32. 32.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
  33. 33.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) sunlight
  34. 34.⚖️ 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) False (b) True
  35. 35.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  36. 36.True or false: vinegar is something yeast needs. (a) True (b) False
  37. 37.⚖️ 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) True (b) False
  38. 38.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
  39. 39.🔍 Which is the odd one out? (a) time (b) vinegar (c) warm water (d) sugar
  40. 40.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it

Answer key

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

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