← Yeast balloon lesson New set →

Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 53 · 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.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to colour it (c) to make it sweet (d) to make it heavy
  2. 2.True or false: vinegar is something yeast needs. (a) True (b) False
  3. 3.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of stone (d) a kind of salt
  4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
  5. 5.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
  6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) dry yeast (d) a comb
  7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we keep it the same (b) we change it (c) we measure it
  8. 8.⚖️ 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
  9. 9.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
  10. 10.True or false: sugar is something yeast needs. (a) True (b) False
  11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) dry yeast (c) sugar (d) warm water
  12. 12.True or false: time is something yeast does not need. (a) True (b) False
  13. 13.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
  14. 14.True or false: time is something yeast needs. (a) False (b) True
  15. 15.True or false: sugar is needed for the yeast balloon. (a) True (b) False
  16. 16.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  17. 17.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a comb (d) dry yeast
  18. 18.True or false: warm water is needed for the yeast balloon. (a) True (b) False
  19. 19.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) salt (d) a magnet
  20. 20.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a comb (d) turmeric powder
  21. 21.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
  22. 22.🔍 Which is the odd one out? (a) vinegar (b) time (c) salt (d) sunlight
  23. 23.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a paper clip (d) a small bottle
  24. 24.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
  25. 25.⚖️ 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 yeast (b) the amount of water (c) the amount of sugar (d) the water temperature
  26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) True (b) False
  27. 27.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) salt
  28. 28.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
  29. 29.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) dry yeast (d) a mirror
  30. 30.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
  31. 31.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
  32. 32.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
  33. 33.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) warm water (c) a battery cell (d) a mirror
  34. 34.⚖️ 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 water (b) size of the balloon (c) the amount of sugar (d) the water temperature
  35. 35.⚖️ 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
  36. 36.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
  37. 37.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
  38. 38.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
  39. 39.True or false: salt is something yeast does not need. (a) True (b) False
  40. 40.True or false: a magnet is something yeast does not need. (a) True (b) False

Answer key

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

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids