Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 766 · 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 needs? (a) a magnet (b) sunlight (c) sugar (d) salt
2. 2.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
3. 3.True or false: sunlight is something yeast does not need. (a) True (b) False
4. 4.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
5. 5.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
6. 6.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) sugar (d) a magnet
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) warm water (d) a mirror
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) sugar (c) a balloon (d) dry yeast
11. 11.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) warm water (d) a paper clip
12. 12.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it turns to sugar (d) it glows
13. 13.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold water is heavy (d) cold makes it pink
15. 15.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) sugar (d) dry yeast
17. 17.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
18. 18.🛟 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
19. 19.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
20. 20.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
21. 21.True or false: warm water is something yeast does not need. (a) False (b) True
22. 22.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
23. 23.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
24. 24.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
25. 25.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
26. 26.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
27. 27.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
28. 28.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
29. 29.🔍 Which is the odd one out? (a) warm water (b) sugar (c) salt (d) time
30. 30.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) a small bottle (d) a mirror
32. 32.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) time (d) warm water
33. 33.⚖️ 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 yeast (b) the water temperature (c) size of the balloon (d) the same bottles
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) sugar (d) a magnet
35. 35.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a comb (c) a paper clip (d) a magnet
36. 36.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to colour it (c) to make it heavy (d) to make it sweet
37. 37.🔍 Which is the odd one out? (a) time (b) vinegar (c) warm water (d) sugar
38. 38.True or false: warm water is needed for the yeast balloon. (a) False (b) True
39. 39.⚖️ 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
40. 40.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) a magnet

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