Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 496 · 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.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) sugar (d) a magnet
3. 3.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
4. 4.⚖️ 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) False (b) True
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) warm water (c) sugar (d) a balloon
6. 6.🔍 Which is the odd one out? (a) vinegar (b) time (c) a magnet (d) salt
7. 7.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) salt
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a paper clip (d) sugar
9. 9.⚖️ 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
10. 10.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
11. 11.True or false: sunlight is something yeast does not need. (a) False (b) True
12. 12.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
13. 13.True or false: warm water is needed for the yeast balloon. (a) False (b) True
14. 14.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
15. 15.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a magnet (c) turmeric powder (d) a battery cell
16. 16.⚖️ 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
17. 17.⚖️ 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) True (b) False
18. 18.True or false: time is something yeast does not need. (a) False (b) True
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a comb (c) sugar (d) warm water
20. 20.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) salt (d) warm water
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a small bottle (d) a paper clip
25. 25.🔍 Which is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
26. 26.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
27. 27.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) air from outside (d) steam
28. 28.True or false: vinegar is something yeast does not need. (a) True (b) False
29. 29.⚖️ 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 water (b) the amount of yeast (c) the same bottles (d) the water temperature
30. 30.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to colour rice (d) to clean floors
31. 31.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
32. 32.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) a balloon (c) a small bottle (d) dry yeast
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a balloon (c) dry yeast (d) warm water
35. 35.⚖️ 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
36. 36.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.🍞 Which of these is something yeast needs? (a) time (b) salt (c) sunlight (d) vinegar
38. 38.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) sunlight (d) warm water
39. 39.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) vinegar (d) warm water
40. 40.True or false: sugar is something yeast does not need. (a) True (b) False

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