Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 152 · 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: sugar is needed for the yeast balloon. (a) True (b) False
2. 2.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
3. 3.⚖️ 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 yeast
4. 4.⚖️ 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 keep it the same (c) we measure it
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.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
7. 7.True or false: a magnet is something yeast does not need. (a) False (b) True
8. 8.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
9. 9.True or false: warm water is needed for the yeast balloon. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) salt (b) sugar (c) time (d) warm water
11. 11.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) air from outside (d) carbon dioxide gas
12. 12.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
13. 13.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
14. 14.⚖️ 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
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a small bottle (d) a magnet
16. 16.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a comb (d) a balloon
18. 18.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) vinegar
19. 19.⚖️ 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
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 yeast”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.⚖️ 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 keep it the same (b) we measure it (c) we change it
22. 22.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a paper clip (c) dry yeast (d) warm water
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a balloon (d) turmeric powder
24. 24.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
25. 25.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) sugar (d) salt
26. 26.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) a balloon (c) warm water (d) a small bottle
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) a battery cell (d) dry yeast
29. 29.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a battery cell (c) warm water (d) dry yeast
31. 31.True or false: vinegar is something yeast needs. (a) False (b) True
32. 32.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sunlight (d) sugar
33. 33.⚖️ 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 water (c) size of the balloon (d) the same bottles
34. 34.⚖️ 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
35. 35.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
36. 36.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) warm water (d) a mirror
38. 38.⚖️ 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
39. 39.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.⚖️ 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) True (b) False

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