Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 245 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a balloon (d) a magnet
2. 2.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sugar (d) salt
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 amount of yeast (b) size of the balloon (c) the water temperature (d) the amount of water
4. 4.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
5. 5.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
6. 6.⚖️ 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 water (c) the same bottles (d) the amount of yeast
7. 7.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
8. 8.⚖️ 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 measure it (b) we change it (c) we keep it the same
9. 9.⚖️ 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
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a battery cell (c) a small bottle (d) dry yeast
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
13. 13.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it turns to sugar (d) it grows faster
14. 14.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) time (d) vinegar
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) sugar (d) turmeric powder
16. 16.🔍 Which is the odd one out? (a) sugar (b) time (c) sunlight (d) warm water
17. 17.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) a magnet (d) vinegar
18. 18.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a balloon (d) a battery cell
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a paper clip (d) sugar
20. 20.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
21. 21.⚖️ 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 water (b) size of the balloon (c) the water temperature
22. 22.⚖️ 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
23. 23.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a kind of salt (d) a tiny living fungus
24. 24.⚖️ 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
25. 25.True or false: warm water is something yeast needs. (a) True (b) False
26. 26.⚖️ 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
27. 27.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
28. 28.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) warm water (d) salt
29. 29.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
30. 30.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) turmeric powder (d) a balloon
33. 33.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) it shrinks to nothing (d) the balloon is smaller
34. 34.⚖️ 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
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) False (b) True
36. 36.🔍 Which is the odd one out? (a) a magnet (b) salt (c) warm water (d) sunlight
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 kept the same. (a) True (b) False
38. 38.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
39. 39.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
40. 40.True or false: a magnet is something yeast needs. (a) False (b) True

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