Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 871 · 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.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows much faster (d) it grows very little
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
3. 3.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) a mirror (d) dry yeast
4. 4.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) vinegar
5. 5.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
6. 6.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) vinegar (d) sunlight
7. 7.🔍 Which is the odd one out? (a) salt (b) vinegar (c) sugar (d) a magnet
8. 8.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
9. 9.🔍 Which is the odd one out? (a) a magnet (b) salt (c) vinegar (d) warm water
10. 10.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
11. 11.⚖️ 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
12. 12.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) dry yeast (d) turmeric powder
14. 14.🔍 Which is the odd one out? (a) vinegar (b) salt (c) sunlight (d) time
15. 15.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) sunlight (d) warm water
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) dry yeast (c) a balloon (d) sugar
17. 17.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
18. 18.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it shrinks to nothing (d) it turns to bread
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a comb (d) dry yeast
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.⚖️ 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 yeast (b) the amount of sugar (c) the amount of water (d) the water temperature
22. 22.⚖️ 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 amount of sugar (c) the water temperature (d) size of the balloon
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.True or false: sugar is something yeast needs. (a) False (b) True
25. 25.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) sugar (d) a battery cell
26. 26.True or false: time is something yeast needs. (a) True (b) False
27. 27.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) a magnet (b) time (c) warm water (d) sugar
29. 29.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a battery cell (d) warm water
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a paper clip (c) dry yeast (d) sugar
32. 32.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
33. 33.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) time (d) vinegar
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) warm water (d) a magnet
35. 35.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) True (b) False
37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
38. 38.⚖️ 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
39. 39.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) turmeric powder (d) a small bottle

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