Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 867 · 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.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
2. 2.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) time (d) warm water
3. 3.⚖️ 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 keep it the same (b) we measure it (c) we change it
4. 4.🔍 Which is the odd one out? (a) salt (b) time (c) warm water (d) sugar
5. 5.True or false: warm water is something yeast does not need. (a) False (b) True
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) a mirror (d) sugar
7. 7.⚖️ 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) False (b) True
8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) the balloon is smaller (d) it shrinks to nothing
9. 9.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) sugar (d) a comb
12. 12.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
13. 13.True or false: a magnet is something yeast does not need. (a) False (b) True
14. 14.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
15. 15.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.⚖️ 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) False (b) True
17. 17.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) salt (d) warm water
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a magnet (c) dry yeast (d) warm water
19. 19.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) warm water
20. 20.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
21. 21.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold makes it pink (d) cold slows yeast down
22. 22.True or false: a comb is needed for the yeast balloon. (a) True (b) False
23. 23.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) salt (d) time
24. 24.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to wash dishes (d) to make bread rise
27. 27.True or false: vinegar is something yeast needs. (a) False (b) True
28. 28.True or false: sugar is needed for the yeast balloon. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
30. 30.True or false: warm water is something yeast needs. (a) False (b) True
31. 31.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) smoke (d) steam
32. 32.⚖️ 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 change it (b) we measure it (c) we keep it the same
33. 33.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
34. 34.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
35. 35.⚖️ 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) True (b) False
36. 36.🔍 Which is the odd one out? (a) a magnet (b) time (c) sunlight (d) salt
37. 37.True or false: sugar is something yeast does not need. (a) False (b) True
38. 38.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a mirror (d) a battery cell
39. 39.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) salt (d) a magnet
40. 40.⚖️ 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 keep it the same (b) we measure it (c) we change it

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