Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 902 · 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? What do we do with “the same bottles”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
3. 3.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a small bottle (c) turmeric powder (d) a battery cell
4. 4.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
5. 5.True or false: vinegar is something yeast needs. (a) False (b) True
6. 6.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
7. 7.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) sunlight (d) vinegar
8. 8.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
10. 10.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
11. 11.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sugar (d) sunlight
12. 12.True or false: warm water is not needed for the yeast balloon. (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 amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) warm water (d) a paper clip
16. 16.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
17. 17.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) time (b) salt (c) sunlight (d) vinegar
20. 20.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
21. 21.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) it grows faster (d) the yeast is killed
22. 22.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) the balloon is bigger (d) it turns to bread
23. 23.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
24. 24.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) warm water (c) a paper clip (d) a comb
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) a balloon (d) dry yeast
26. 26.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to clean floors (d) to wash dishes
27. 27.🔍 Which is the odd one out? (a) time (b) sunlight (c) sugar (d) warm water
28. 28.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) a small bottle (d) a mirror
31. 31.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) vinegar
32. 32.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.⚖️ 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
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a battery cell (c) sugar (d) dry yeast
35. 35.True or false: time is something yeast needs. (a) True (b) False
36. 36.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of stone (d) a kind of salt
37. 37.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
38. 38.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) dry yeast (d) a battery cell
40. 40.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) a magnet

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