Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 462 · 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: a magnet is something yeast does not need. (a) False (b) True
2. 2.⚖️ 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 sugar (b) the amount of water (c) the water temperature (d) the amount of yeast
3. 3.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
5. 5.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) the balloon is smaller (d) it turns to bread
6. 6.⚖️ 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) False (b) True
7. 7.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice
8. 8.🔍 Which is the odd one out? (a) sunlight (b) time (c) a magnet (d) vinegar
9. 9.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
10. 10.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
12. 12.⚖️ 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
13. 13.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
14. 14.True or false: time is something yeast needs. (a) False (b) True
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) sugar (d) a battery cell
16. 16.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) salt (d) sugar
17. 17.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a magnet (d) a small bottle
19. 19.⚖️ 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) False (b) True
20. 20.⚖️ 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
21. 21.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to make it sweet (c) to colour it (d) it is food for yeast
22. 22.True or false: salt is something yeast needs. (a) False (b) True
23. 23.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a mirror (d) a small bottle
25. 25.⚖️ 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
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a magnet (d) a balloon
27. 27.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) dry yeast (c) sugar (d) a small bottle
29. 29.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a paper clip (d) a magnet
30. 30.🔍 Which is the odd one out? (a) warm water (b) salt (c) time (d) sugar
31. 31.🍞 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
32. 32.🔍 Which is the odd one out? (a) time (b) vinegar (c) warm water (d) sugar
33. 33.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) turmeric powder (d) sugar
36. 36.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
37. 37.⚖️ 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) False (b) True
38. 38.🔍 Which is the odd one out? (a) salt (b) sunlight (c) vinegar (d) sugar
39. 39.⚖️ 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 keep it the same (b) we measure it (c) we change it
40. 40.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) time (d) warm water

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