Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 492 · 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 battery cell for the yeast balloon? (a) needed (b) not needed
2. 2.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) time (d) sunlight
3. 3.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a paper clip (d) turmeric powder
4. 4.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
5. 5.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
6. 6.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a paper clip (d) a small bottle
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a mirror (d) a small bottle
9. 9.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.⚖️ 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 same bottles (c) the water temperature (d) size of the balloon
11. 11.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
13. 13.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
14. 14.True or false: time is something yeast does not need. (a) False (b) True
15. 15.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
16. 16.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
17. 17.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
18. 18.True or false: warm water is needed for the yeast balloon. (a) False (b) True
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
20. 20.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
21. 21.⚖️ 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 measure it (c) we keep it the same
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) sugar (d) a mirror
23. 23.⚖️ 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) False (b) True
24. 24.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
26. 26.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
27. 27.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a battery cell (d) dry yeast
29. 29.True or false: salt is something yeast does not need. (a) True (b) False
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) turmeric powder (d) dry yeast
31. 31.🔍 Which is the odd one out? (a) a magnet (b) salt (c) warm water (d) sunlight
32. 32.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) warm water (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 water”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a comb (c) warm water (d) dry yeast
36. 36.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) sunlight (d) salt
37. 37.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) a magnet
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the same bottles (c) the water temperature
39. 39.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
40. 40.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) salt (d) warm water

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