Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 924 · 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: vinegar 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 kept the same? (a) size of the balloon (b) the same bottles (c) the water temperature
3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) keep it for a month (d) throw it at a wall
4. 4.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sugar (d) sunlight
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of water (c) the water temperature
6. 6.True or false: time is something yeast does not need. (a) True (b) False
7. 7.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a mirror (c) a battery cell (d) a magnet
8. 8.⚖️ 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 sugar (b) the water temperature (c) size of the balloon
9. 9.⚖️ 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 keep it the same (c) we change it
10. 10.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
11. 11.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
12. 12.True or false: a magnet is something yeast does not need. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) salt (d) vinegar
14. 14.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
15. 15.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
16. 16.🍞 Which of these is something yeast does not need? (a) salt (b) warm water (c) time (d) sugar
17. 17.⚖️ 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 sugar (b) size of the balloon (c) the water temperature (d) the amount of water
18. 18.⚖️ 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
19. 19.⚖️ 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
20. 20.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
21. 21.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
22. 22.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) vinegar (d) warm water
23. 23.🔍 Which is the odd one out? (a) vinegar (b) salt (c) sugar (d) sunlight
24. 24.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) sugar (d) time
25. 25.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) time (d) warm water
26. 26.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
27. 27.⚖️ 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) size of the balloon (c) the same bottles (d) the amount of yeast
28. 28.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) air from outside (d) smoke
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a small bottle (d) a battery cell
30. 30.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) True (b) False
32. 32.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
33. 33.⚖️ 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 keep it the same (c) we measure it
34. 34.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
35. 35.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
36. 36.⚖️ 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
37. 37.True or false: sugar is something yeast needs. (a) True (b) False
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a magnet (c) a small bottle (d) sugar
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) sugar (d) turmeric powder
40. 40.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) sugar (d) warm water

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