Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 116 · 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 does not need? (a) salt (b) time (c) sugar (d) warm water
2. 2.⚖️ 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
3. 3.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
4. 4.⚖️ 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) size of the balloon (b) the amount of sugar (c) the water temperature (d) the amount of water
5. 5.True or false: sugar is something yeast does not need. (a) False (b) True
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a paper clip (d) warm water
7. 7.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) dry yeast (d) a magnet
9. 9.🍞 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
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) a small bottle (d) sugar
11. 11.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
12. 12.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) sunlight (d) vinegar
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) warm water (c) dry yeast (d) sugar
14. 14.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.⚖️ 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 change it (c) we measure it
16. 16.🍞 Which of these is something yeast does not need? (a) a magnet (b) time (c) sugar (d) warm water
17. 17.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
18. 18.🔍 Which is the odd one out? (a) time (b) sugar (c) salt (d) warm water
19. 19.⚖️ 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
20. 20.🍞 Which of these is something yeast needs? (a) time (b) vinegar (c) salt (d) sunlight
21. 21.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
22. 22.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) a mirror (d) sugar
24. 24.🛟 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
25. 25.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
26. 26.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
27. 27.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
28. 28.⚖️ 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
29. 29.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) smoke (d) steam
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a mirror (d) dry yeast
31. 31.True or false: time is something yeast needs. (a) True (b) False
32. 32.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
33. 33.True or false: a magnet is something yeast needs. (a) False (b) True
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a mirror (c) a magnet (d) turmeric powder
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) size of the balloon (c) the amount of water (d) the amount of sugar
36. 36.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.⚖️ 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 change it (b) we measure it (c) we keep it the same
38. 38.True or false: salt is something yeast does not need. (a) True (b) False
39. 39.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of sugar

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