Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 940 · 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? True or false: the same bottles is kept the same. (a) True (b) False
2. 2.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
3. 3.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a comb (c) a magnet (d) a mirror
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a balloon (d) a magnet
5. 5.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
6. 6.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sugar (d) sunlight
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) warm water (d) a comb
8. 8.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
9. 9.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
11. 11.⚖️ 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) size of the balloon (b) the water temperature (c) the amount of yeast (d) the amount of sugar
12. 12.⚖️ 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
13. 13.⚖️ 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 measure it (c) we keep it the same
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it sweet (c) to colour it (d) to make it heavy
16. 16.True or false: salt is something yeast needs. (a) False (b) True
17. 17.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) sugar (d) warm water
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 water (b) the amount of yeast (c) size of the balloon (d) the water temperature
19. 19.True or false: time is something yeast does not need. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) salt (d) warm water
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) dry yeast (d) a battery cell
22. 22.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) sugar (d) warm water
23. 23.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) sugar (d) warm water
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 change it (b) we measure it (c) we keep it the same
27. 27.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
28. 28.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) salt
29. 29.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold slows yeast down (d) cold makes it pink
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a comb (d) a balloon
32. 32.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
33. 33.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.⚖️ 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 sugar (c) size of the balloon
35. 35.True or false: sunlight is something yeast needs. (a) False (b) True
36. 36.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
37. 37.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) warm water (d) a magnet
38. 38.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
39. 39.⚖️ 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) True (b) False
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a mirror (c) a small bottle (d) dry yeast

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