Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 320 · 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.True or false: time is something yeast needs. (a) False (b) True
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) turmeric powder (d) a balloon
3. 3.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a small bottle (d) a battery cell
4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
5. 5.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) vinegar (d) sunlight
6. 6.⚖️ 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) True (b) False
7. 7.⚖️ 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 same bottles
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
9. 9.⚖️ 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 keep it the same (b) we measure it (c) we change it
10. 10.True or false: sugar is something yeast does not need. (a) False (b) True
11. 11.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
12. 12.True or false: warm water is something yeast needs. (a) True (b) False
13. 13.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
14. 14.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a small bottle (d) a comb
16. 16.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) time (d) sugar
17. 17.⚖️ 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 water temperature (c) the amount of sugar (d) the amount of yeast
18. 18.⚖️ 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
19. 19.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) sunlight (d) salt
20. 20.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
21. 21.⚖️ 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 water
22. 22.⚖️ 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
23. 23.⚖️ 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
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a paper clip (d) warm water
25. 25.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
26. 26.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
27. 27.🔍 Which is the odd one out? (a) a magnet (b) salt (c) time (d) vinegar
28. 28.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
29. 29.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
30. 30.⚖️ 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) False (b) True
31. 31.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to colour rice (d) to wash dishes
32. 32.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
33. 33.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
34. 34.True or false: salt is something yeast does not need. (a) True (b) False
35. 35.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
36. 36.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) sugar (d) warm water
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) dry yeast (c) a balloon (d) sugar
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) turmeric powder (c) warm water (d) a balloon
39. 39.True or false: vinegar is something yeast does not need. (a) False (b) True
40. 40.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a battery cell (c) a paper clip (d) warm water

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