Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 668 · 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 needed for the yeast balloon? (a) a comb (b) a mirror (c) a balloon (d) turmeric powder
2. 2.🔍 Which is the odd one out? (a) sugar (b) salt (c) warm water (d) time
3. 3.⚖️ 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
4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once
5. 5.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
7. 7.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
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 water temperature (b) the amount of water (c) size of the balloon
9. 9.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) turmeric powder (d) dry yeast
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) sugar (d) a mirror
12. 12.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
13. 13.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) salt (d) warm water
14. 14.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
15. 15.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a magnet (d) a small bottle
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 same bottles (b) size of the balloon (c) the amount of sugar (d) the water temperature
18. 18.⚖️ 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 amount of yeast (d) the water temperature
19. 19.🔮 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
20. 20.⚖️ 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
21. 21.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) steam (d) carbon dioxide gas
22. 22.⚖️ 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
23. 23.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) sugar (d) warm water
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.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
27. 27.🧺 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 battery cell
28. 28.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) warm water (d) salt
29. 29.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
30. 30.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
35. 35.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) sugar (d) time
36. 36.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
37. 37.⚖️ 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
38. 38.True or false: sunlight is something yeast does not need. (a) False (b) True
39. 39.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
40. 40.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed

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