← Yeast balloon lesson New set →

Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 784 · 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.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) sugar (d) warm water
  2. 2.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
  3. 3.⚖️ 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
  4. 4.🔍 Which is the odd one out? (a) vinegar (b) salt (c) a magnet (d) warm water
  5. 5.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a balloon (d) a magnet
  6. 6.True or false: time is something yeast needs. (a) True (b) False
  7. 7.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold
  8. 8.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of salt (d) a kind of sugar
  9. 9.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
  10. 10.True or false: time is something yeast does not need. (a) True (b) False
  11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
  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 amount of water (b) the amount of yeast (c) size of the balloon (d) the water temperature
  13. 13.True or false: salt is something yeast does not need. (a) True (b) False
  14. 14.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) air from outside (d) carbon dioxide gas
  15. 15.⚖️ 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
  16. 16.True or false: vinegar is something yeast does not need. (a) False (b) True
  17. 17.🍞 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
  18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) a balloon (d) sugar
  19. 19.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) a battery cell (d) a small bottle
  20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a magnet (d) sugar
  21. 21.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
  22. 22.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
  23. 23.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a balloon (c) sugar (d) a small bottle
  24. 24.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
  25. 25.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
  26. 26.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) a paper clip (d) warm water
  27. 27.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
  28. 28.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
  29. 29.True or false: salt is something yeast needs. (a) True (b) False
  30. 30.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
  31. 31.True or false: warm water is needed for the yeast balloon. (a) False (b) True
  32. 32.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
  33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
  34. 34.True or false: sunlight is something yeast needs. (a) True (b) False
  35. 35.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) it grows faster (d) the yeast is killed
  36. 36.🔍 Which is the odd one out? (a) salt (b) sugar (c) sunlight (d) vinegar
  37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a comb (d) a small bottle
  38. 38.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
  39. 39.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) turmeric powder (d) sugar
  40. 40.⚖️ 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

Answer key

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

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