Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 270 · 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.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a balloon (c) a small bottle (d) sugar
3. 3.🔍 Which is the odd one out? (a) a magnet (b) time (c) sugar (d) warm water
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) dry yeast (c) warm water (d) a balloon
5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a magnet (d) a balloon
7. 7.True or false: sugar is something yeast needs. (a) False (b) True
8. 8.⚖️ 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 sugar (b) the water temperature (c) size of the balloon
9. 9.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
10. 10.True or false: a magnet is something yeast does not need. (a) True (b) False
11. 11.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) salt (d) time
12. 12.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) smoke (d) air from outside
13. 13.🔍 Which is the odd one out? (a) a magnet (b) time (c) vinegar (d) salt
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) turmeric powder (d) a comb
16. 16.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to make bread rise (d) to wash dishes
17. 17.⚖️ 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 sugar (b) the same bottles (c) the water temperature (d) the amount of yeast
18. 18.🧺 Do we need sugar 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? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
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 yeast”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
22. 22.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sugar (d) time
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
24. 24.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
26. 26.True or false: sunlight is something yeast needs. (a) False (b) True
27. 27.True or false: sugar is needed for the yeast balloon. (a) True (b) False
28. 28.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
29. 29.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
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 change it (c) we keep it the same
31. 31.⚖️ 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
32. 32.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) vinegar
33. 33.🔍 Which is the odd one out? (a) sugar (b) salt (c) warm water (d) time
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the water temperature (c) the amount of yeast (d) size of the balloon
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) warm water (d) a comb
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
38. 38.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
39. 39.🍞 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
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) warm water (d) dry yeast

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