Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 630 · 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) a small bottle (b) a magnet (c) warm water (d) a balloon
2. 2.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
3. 3.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a balloon (c) dry yeast (d) sugar
5. 5.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) sunlight (d) salt
6. 6.True or false: salt is something yeast needs. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) time (b) warm water (c) salt (d) sugar
8. 8.⚖️ 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 change it (c) we keep it the same
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) the water temperature (c) size of the balloon
10. 10.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
11. 11.True or false: warm water is needed for the yeast balloon. (a) True (b) False
12. 12.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) warm water (d) turmeric powder
13. 13.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) air from outside (d) smoke
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) warm water (d) dry yeast
15. 15.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
16. 16.⚖️ 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 water (b) size of the balloon (c) the same bottles (d) the amount of sugar
17. 17.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
18. 18.⚖️ 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 water temperature (c) the amount of yeast
19. 19.🔍 Which is the odd one out? (a) warm water (b) sugar (c) sunlight (d) time
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a mirror (c) a balloon (d) warm water
21. 21.True or false: time is something yeast does not need. (a) True (b) False
22. 22.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) salt (d) a magnet
23. 23.🔍 Which is the odd one out? (a) sugar (b) time (c) vinegar (d) warm water
24. 24.🔍 Which is the odd one out? (a) time (b) a magnet (c) warm water (d) sugar
25. 25.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a battery cell (c) a balloon (d) a mirror
28. 28.🍞 Which of these is something yeast does not need? (a) vinegar (b) sugar (c) time (d) warm water
29. 29.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) turmeric powder (d) dry yeast
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a battery cell (d) sugar
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) sugar (d) warm water
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) sugar (b) a battery cell (c) dry yeast (d) warm water
34. 34.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
35. 35.True or false: a comb is needed for the yeast balloon. (a) True (b) False
36. 36.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
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 change it (b) we measure it (c) we keep it the same
38. 38.True or false: sunlight is something yeast needs. (a) False (b) True
39. 39.⚖️ 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 keep it the same (c) we measure it
40. 40.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink

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