Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 237 · 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.⚖️ 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 change it (b) we measure it (c) we keep it the same
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) turmeric powder (d) dry yeast
3. 3.⚖️ 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) size of the balloon (c) the amount of yeast
4. 4.⚖️ 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 same bottles (c) the water temperature (d) the amount of yeast
5. 5.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) vinegar
6. 6.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
7. 7.True or false: time is something yeast needs. (a) False (b) True
8. 8.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) put it in your mouth (d) throw it at a wall
9. 9.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
11. 11.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) warm water (d) salt
12. 12.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster
14. 14.True or false: sugar is something yeast needs. (a) True (b) False
15. 15.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) ice cold (d) very salty
16. 16.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
17. 17.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it turns to bread (d) it shrinks to nothing
18. 18.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) vinegar (d) sugar
19. 19.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) sunlight (d) salt
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) sugar (d) a magnet
21. 21.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down
22. 22.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
23. 23.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
24. 24.⚖️ 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 change it (b) we keep it the same (c) we measure it
25. 25.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) warm water (c) a balloon (d) sugar
27. 27.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
28. 28.⚖️ 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) True (b) False
29. 29.⚖️ 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 change it (b) we keep it the same (c) we measure it
30. 30.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
31. 31.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) sugar (d) warm water
32. 32.True or false: warm water is something yeast does not need. (a) True (b) False
33. 33.⚖️ 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 keep it the same (c) we change it
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) salt (b) vinegar (c) a magnet (d) time
36. 36.⚖️ 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
37. 37.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) sugar (c) a battery cell (d) a magnet
38. 38.⚖️ 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) True (b) False
39. 39.⚖️ 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) size of the balloon (c) the same bottles (d) the amount of sugar
40. 40.🔍 Which is the odd one out? (a) time (b) sunlight (c) sugar (d) warm water

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