Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 954 · 40 questions

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.

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

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