Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 425 · 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.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) sunlight (d) vinegar
2. 2.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.⚖️ 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 amount of yeast
4. 4.🔍 Which is the odd one out? (a) warm water (b) time (c) sunlight (d) sugar
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a paper clip (c) dry yeast (d) a small bottle
6. 6.⚖️ 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 change it (b) we measure it (c) we keep it the same
7. 7.⚖️ 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 water temperature (d) the amount of yeast
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 measure it (b) we keep it the same (c) we change it
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
10. 10.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
11. 11.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) dry yeast (d) turmeric powder
12. 12.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the same bottles (c) size of the balloon
15. 15.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a battery cell (d) sugar
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a comb (c) a battery cell (d) a paper clip
18. 18.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
19. 19.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
20. 20.True or false: salt is something yeast needs. (a) False (b) True
21. 21.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) vinegar (d) warm water
22. 22.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
23. 23.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) a magnet
25. 25.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
26. 26.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold water is heavy (d) cold makes it pink
27. 27.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) sunlight
28. 28.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
29. 29.True or false: vinegar is something yeast does not need. (a) False (b) True
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a battery cell (d) a magnet
31. 31.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) carbon dioxide gas (d) air from outside
32. 32.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) time (d) sugar
33. 33.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a comb (c) a balloon (d) a small bottle
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) sugar (d) dry yeast
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a battery cell (d) sugar
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) dry yeast (d) warm water
38. 38.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) sunlight (d) vinegar
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of sugar (c) size of the balloon
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a comb (d) dry yeast

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