Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 364 · 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.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a mirror (c) dry yeast (d) sugar
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a small bottle (c) dry yeast (d) sugar
3. 3.🔮 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
4. 4.⚖️ 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) False (b) True
5. 5.True or false: sugar is needed for the yeast balloon. (a) True (b) False
6. 6.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
8. 8.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a paper clip (c) turmeric powder (d) a comb
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a balloon (c) a small bottle (d) dry yeast
11. 11.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
12. 12.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sunlight (d) sugar
13. 13.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) vinegar (d) sunlight
14. 14.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a small bottle (c) warm water (d) a balloon
16. 16.⚖️ 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) the amount of sugar (c) size of the balloon
17. 17.True or false: warm water is something yeast needs. (a) True (b) False
18. 18.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
19. 19.⚖️ 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 water temperature (b) the same bottles (c) the amount of yeast (d) the amount of water
20. 20.⚖️ 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
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.⚖️ 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) size of the balloon (c) the same bottles (d) the amount of sugar
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
25. 25.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) dry yeast (d) a mirror
27. 27.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) salt (d) warm water
28. 28.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
29. 29.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) salt (d) vinegar
30. 30.🔍 Which is the odd one out? (a) a magnet (b) salt (c) sunlight (d) time
31. 31.True or false: warm water is something yeast does not need. (a) False (b) True
32. 32.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
33. 33.🔮 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
34. 34.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) turmeric powder (c) a paper clip (d) a magnet
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.⚖️ 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) True (b) False
37. 37.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) warm water (c) a small bottle (d) sugar
39. 39.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it bursts at once (d) it grows much faster
40. 40.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty

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