Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 530 · 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.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
2. 2.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) warm water (d) vinegar
3. 3.🔍 Which is the odd one out? (a) time (b) salt (c) a magnet (d) vinegar
4. 4.🔍 Which is the odd one out? (a) salt (b) warm water (c) vinegar (d) sunlight
5. 5.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
6. 6.🔍 Which is the odd one out? (a) salt (b) sugar (c) sunlight (d) a magnet
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
8. 8.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) vinegar (d) a magnet
9. 9.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
10. 10.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) the balloon is bigger (d) it shrinks to nothing
11. 11.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.True or false: a magnet is something yeast does not need. (a) False (b) True
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
14. 14.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) dry yeast (d) a mirror
16. 16.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
17. 17.⚖️ 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
18. 18.⚖️ 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) the amount of sugar (c) the amount of yeast (d) size of the balloon
19. 19.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) sugar (c) a small bottle (d) dry yeast
21. 21.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
22. 22.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) a mirror (d) a comb
24. 24.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.⚖️ 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 same bottles (c) the amount of sugar (d) the water temperature
26. 26.⚖️ 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
27. 27.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) time (d) warm water
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) a magnet (d) warm water
29. 29.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
30. 30.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) time (d) warm water
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a mirror (d) dry yeast
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a battery cell (d) dry yeast
34. 34.⚖️ 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 measure it (c) we change it
35. 35.🔍 Which is the odd one out? (a) warm water (b) time (c) sunlight (d) sugar
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) turmeric powder (d) a balloon
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 keep it the same (c) we change it
38. 38.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
39. 39.⚖️ 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
40. 40.True or false: sugar is something yeast needs. (a) True (b) False

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