Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 767 · 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 water temperature is kept the same. (a) True (b) False
2. 2.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
4. 4.🔍 Which is the odd one out? (a) sunlight (b) time (c) warm water (d) sugar
5. 5.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold slows yeast down (d) cold water is heavy
6. 6.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
7. 7.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) a magnet (d) sugar
8. 8.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
9. 9.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
10. 10.🛟 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
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) sugar (c) a small bottle (d) warm water
12. 12.⚖️ 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
13. 13.⚖️ 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 keep it the same (c) we change it
14. 14.🔍 Which is the odd one out? (a) time (b) warm water (c) vinegar (d) sugar
15. 15.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) salt (d) a magnet
16. 16.⚖️ 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
17. 17.🔍 Which is the odd one out? (a) a magnet (b) salt (c) sugar (d) vinegar
18. 18.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
19. 19.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) sugar (d) warm water
20. 20.⚖️ 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 water
21. 21.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) the balloon is bigger (d) it shrinks to nothing
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) warm water (d) a magnet
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a comb (c) dry yeast (d) warm water
24. 24.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
25. 25.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of salt (d) a kind of sugar
26. 26.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
27. 27.⚖️ 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
28. 28.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
29. 29.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of sugar (c) the same bottles (d) size of the balloon
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) turmeric powder (d) dry yeast
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a mirror (d) warm water
33. 33.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) salt (b) a magnet (c) warm water (d) vinegar
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
36. 36.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) vinegar (d) sugar
37. 37.⚖️ 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 keep it the same (c) we measure it
38. 38.⚖️ 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
39. 39.True or false: sugar is something yeast needs. (a) True (b) False
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) warm water (d) turmeric powder

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