Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 696 · 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) False (b) True
2. 2.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of yeast (c) size of the balloon (d) the amount of water
4. 4.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) salt (d) vinegar
5. 5.⚖️ 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 yeast (c) size of the balloon
6. 6.⚖️ 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 keep it the same (c) we measure it
7. 7.True or false: time 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? True or false: the same bottles is the one thing we change. (a) False (b) True
9. 9.⚖️ 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) False (b) True
10. 10.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.⚖️ 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
12. 12.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) sunlight
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
14. 14.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a magnet (c) a paper clip (d) turmeric powder
15. 15.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) turmeric powder (d) dry yeast
17. 17.True or false: a magnet is something yeast needs. (a) False (b) True
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) dry yeast (d) warm water
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) warm water (c) a balloon (d) dry yeast
20. 20.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) sunlight (d) vinegar
21. 21.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once
22. 22.⚖️ 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
23. 23.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) a magnet
25. 25.⚖️ 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
26. 26.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) salt (d) time
27. 27.True or false: sugar is not 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? True or false: the water temperature is the one thing we change. (a) False (b) True
29. 29.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
30. 30.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
31. 31.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) sugar (d) time
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) sugar (d) a mirror
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) warm water (d) a balloon
34. 34.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) it grows faster (d) the yeast is killed
35. 35.🔍 Which is the odd one out? (a) salt (b) warm water (c) time (d) sugar
36. 36.🔍 Which is the odd one out? (a) sunlight (b) time (c) warm water (d) sugar
37. 37.⚖️ 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
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) a paper clip (d) warm water
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a paper clip (d) a balloon
40. 40.True or false: salt is something yeast does not need. (a) True (b) False

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