Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 635 · 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 is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
2. 2.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
4. 4.⚖️ 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
5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) dry yeast (d) a small bottle
7. 7.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
8. 8.⚖️ 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 same bottles (b) the amount of water (c) the water temperature (d) the amount of yeast
9. 9.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a balloon (d) turmeric powder
11. 11.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) a magnet
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) turmeric powder (c) a magnet (d) a paper clip
14. 14.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold slows yeast down (d) cold water is heavy
15. 15.🔍 Which is the odd one out? (a) time (b) a magnet (c) salt (d) vinegar
16. 16.⚖️ 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
17. 17.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
19. 19.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
20. 20.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
21. 21.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
22. 22.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) vinegar (d) sugar
23. 23.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
24. 24.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
25. 25.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
26. 26.True or false: sugar is something yeast does not need. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) a magnet (d) sugar
28. 28.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) a balloon (d) dry yeast
30. 30.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
31. 31.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) it turns to bread (d) the balloon is bigger
32. 32.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
33. 33.⚖️ 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) False (b) True
34. 34.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) sugar (d) time
35. 35.⚖️ 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 keep it the same (c) we change it
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
38. 38.True or false: sugar is needed for the yeast balloon. (a) False (b) True
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a comb (d) a paper clip
40. 40.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall

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