Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 669 · 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.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
2. 2.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
3. 3.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
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 measure it (c) we keep it the same
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a magnet (d) sugar
7. 7.🍞 Which of these is something yeast does not need? (a) salt (b) sugar (c) time (d) warm water
8. 8.True or false: warm water is something yeast does not need. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) warm water (d) time
10. 10.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
11. 11.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold makes it pink (d) cold slows yeast down
12. 12.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) time (d) sugar
13. 13.🔍 Which is the odd one out? (a) warm water (b) time (c) salt (d) sugar
14. 14.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a mirror (d) a small bottle
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
17. 17.True or false: a magnet is something yeast does not need. (a) True (b) False
18. 18.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a mirror (c) turmeric powder (d) a comb
19. 19.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) a magnet (d) vinegar
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) dry yeast (c) warm water (d) sugar
22. 22.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
23. 23.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.⚖️ 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 measure it (b) we change it (c) we keep it the same
25. 25.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) a magnet (d) time
26. 26.True or false: salt is something yeast needs. (a) True (b) False
27. 27.True or false: time is something yeast does not need. (a) True (b) False
28. 28.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) warm water (d) salt
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 kept the same. (a) False (b) True
30. 30.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
31. 31.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) the yeast is killed (d) it grows faster
32. 32.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
33. 33.⚖️ 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 keep it the same (b) we measure it (c) we change it
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) a balloon (d) a comb
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) warm water (d) a comb
36. 36.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a magnet (c) turmeric powder (d) a comb
37. 37.⚖️ 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 measure it (b) we change it (c) we keep it the same
38. 38.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) warm water (d) time
40. 40.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice

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