Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 999 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a small bottle (d) a magnet
2. 2.⚖️ 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 water temperature (c) size of the balloon (d) the amount of water
3. 3.True or false: salt is something yeast needs. (a) False (b) True
4. 4.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) dry yeast (d) a paper clip
5. 5.⚖️ 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
6. 6.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
7. 7.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
8. 8.⚖️ 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
9. 9.True or false: warm water is something yeast needs. (a) False (b) True
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a battery cell (d) warm water
11. 11.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a comb (c) a magnet (d) turmeric powder
13. 13.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to clean floors (d) to make bread rise
14. 14.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sugar (d) sunlight
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) warm water (d) dry yeast
16. 16.⚖️ 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
17. 17.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) it turns to sugar (d) the yeast is killed
18. 18.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) sunlight (d) a magnet
19. 19.⚖️ 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
20. 20.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
21. 21.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
23. 23.🔍 Which is the odd one out? (a) a magnet (b) time (c) warm water (d) sugar
24. 24.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
25. 25.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) it shrinks to nothing (d) the balloon is smaller
26. 26.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) warm water (d) sugar
27. 27.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.True or false: vinegar is something yeast does not need. (a) False (b) True
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) turmeric powder (d) dry yeast
30. 30.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
31. 31.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
32. 32.⚖️ 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
33. 33.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) vinegar (d) warm water
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) a balloon (d) a battery cell
36. 36.True or false: vinegar is something yeast needs. (a) True (b) False
37. 37.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold kills sugar (d) cold slows yeast down
38. 38.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) throw it at a wall (d) put it in your mouth
39. 39.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sunlight (d) time
40. 40.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it

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