Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 936 · 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.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a small bottle (d) turmeric powder
3. 3.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
4. 4.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
5. 5.🔍 Which is the odd one out? (a) time (b) sunlight (c) salt (d) a magnet
6. 6.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) it is food for yeast (d) to make it heavy
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) a small bottle (d) dry yeast
9. 9.⚖️ 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
10. 10.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
11. 11.True or false: salt is something yeast does not need. (a) False (b) True
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down
15. 15.⚖️ 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) size of the balloon (c) the water temperature (d) the amount of water
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a paper clip (c) a small bottle (d) warm water
17. 17.⚖️ 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
18. 18.⚖️ 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 yeast (c) size of the balloon
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 amount of water (b) size of the balloon (c) the water temperature
20. 20.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is bigger (d) the balloon is smaller
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a battery cell (d) a small bottle
22. 22.⚖️ 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
23. 23.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) a magnet (d) warm water
24. 24.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it turns to sugar (d) it grows faster
25. 25.🔍 Which is the odd one out? (a) time (b) sugar (c) a magnet (d) warm water
26. 26.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
27. 27.True or false: sugar is needed for the yeast balloon. (a) True (b) False
28. 28.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
29. 29.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) a magnet
30. 30.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) a magnet (b) salt (c) sugar (d) vinegar
32. 32.⚖️ 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 keep it the same (b) we change it (c) we measure it
33. 33.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) sugar (d) warm water
35. 35.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) time (d) sugar
36. 36.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a paper clip (c) a balloon (d) a small bottle
38. 38.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
39. 39.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
40. 40.⚖️ 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) True (b) False

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