Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 269 · 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 amount of water”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) sugar (d) vinegar
3. 3.⚖️ 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 change it (b) we measure it (c) we keep it the same
4. 4.True or false: sunlight is something yeast does not need. (a) False (b) True
5. 5.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) warm water (d) sugar
6. 6.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a tiny living fungus (d) a kind of salt
8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
9. 9.True or false: a magnet is something yeast does not need. (a) False (b) True
10. 10.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it turns to sugar (d) it glows
11. 11.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a battery cell (c) a magnet (d) a mirror
13. 13.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) vinegar (d) time
14. 14.⚖️ 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 measure it (b) we keep it the same (c) we change it
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) dry yeast (c) warm water (d) a balloon
16. 16.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sugar (d) time
17. 17.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) a comb (d) warm water
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) turmeric powder (d) a balloon
20. 20.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
21. 21.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
22. 22.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a paper clip (c) a mirror (d) sugar
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the amount of water (d) the amount of yeast
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
26. 26.⚖️ 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
27. 27.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a magnet (d) a small bottle
29. 29.True or false: warm water is something yeast needs. (a) False (b) True
30. 30.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a battery cell (c) a mirror (d) dry yeast
33. 33.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
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 kept the same. (a) True (b) False
35. 35.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
36. 36.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) sugar (d) time
38. 38.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
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 kept the same. (a) False (b) True
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a battery cell (d) sugar

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