Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 985 · 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) warm water (b) a balloon (c) sugar (d) a comb
2. 2.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
3. 3.True or false: time is something yeast does not need. (a) False (b) True
4. 4.True or false: sugar is needed for the yeast balloon. (a) True (b) False
5. 5.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) air from outside (d) steam
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
7. 7.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it grows faster (d) it turns to sugar
8. 8.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
9. 9.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.True or false: a magnet is something yeast needs. (a) True (b) False
11. 11.⚖️ 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 keep it the same (b) we measure it (c) we change it
12. 12.True or false: warm water is needed for the yeast balloon. (a) False (b) True
13. 13.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
14. 14.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) a paper clip (d) dry yeast
15. 15.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
16. 16.⚖️ 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 water (b) the amount of yeast (c) the amount of sugar (d) the water temperature
17. 17.🔍 Which is the odd one out? (a) warm water (b) salt (c) sugar (d) time
18. 18.True or false: warm water is something yeast needs. (a) False (b) True
19. 19.⚖️ 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) the amount of water (c) size of the balloon (d) the amount of sugar
20. 20.True or false: warm water is something yeast does not need. (a) True (b) False
21. 21.⚖️ 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) True (b) False
22. 22.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a small bottle (d) dry yeast
25. 25.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
26. 26.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
27. 27.🔍 Which is the odd one out? (a) time (b) sugar (c) sunlight (d) warm water
28. 28.True or false: sugar is something yeast does not need. (a) True (b) False
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a battery cell (d) a small bottle
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) warm water (d) dry yeast
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a small bottle (d) a comb
32. 32.⚖️ 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
33. 33.🔮 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
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
35. 35.⚖️ 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) True (b) False
36. 36.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
37. 37.⚖️ 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
38. 38.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to make bread rise (d) to colour rice
39. 39.⚖️ 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
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a balloon (d) a paper clip

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