Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 738 · 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.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a comb (c) dry yeast (d) sugar
4. 4.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a comb (c) a battery cell (d) a magnet
5. 5.⚖️ 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
6. 6.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
7. 7.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) sunlight (d) time
8. 8.⚖️ 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 change it (c) we measure it
9. 9.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) salt (d) warm water
10. 10.⚖️ 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
11. 11.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
12. 12.⚖️ 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
13. 13.⚖️ 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) the amount of yeast (c) size of the balloon
14. 14.True or false: salt is something yeast does not need. (a) False (b) True
15. 15.True or false: vinegar is something yeast needs. (a) False (b) True
16. 16.True or false: salt is something yeast needs. (a) True (b) False
17. 17.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
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 amount of yeast (b) the water temperature (c) size of the balloon (d) the same bottles
19. 19.⚖️ 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 keep it the same (c) we change it
20. 20.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to make bread rise (d) to wash dishes
21. 21.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) a balloon (c) sugar (d) a small bottle
22. 22.⚖️ 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
23. 23.⚖️ 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 water temperature (b) size of the balloon (c) the same bottles (d) the amount of yeast
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) a small bottle (d) sugar
25. 25.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
26. 26.True or false: a magnet is something yeast needs. (a) True (b) False
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a balloon (d) a mirror
28. 28.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a battery cell (d) a balloon
30. 30.True or false: vinegar is something yeast does not need. (a) False (b) True
31. 31.⚖️ 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
32. 32.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) a paper clip (d) a mirror
34. 34.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
35. 35.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) smoke (d) air from outside
36. 36.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
37. 37.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
38. 38.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) a magnet
39. 39.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) a balloon (d) sugar

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