Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 287 · 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 vinegar to make gas? (a) yeast does not need it (b) yeast needs it
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
3. 3.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
4. 4.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) vinegar (d) salt
5. 5.⚖️ 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 change it (b) we keep it the same (c) we measure it
6. 6.⚖️ 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
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) warm water (d) turmeric powder
8. 8.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
9. 9.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
12. 12.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a magnet (c) a mirror (d) a comb
14. 14.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it turns to bread (d) it shrinks to nothing
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 yeast (b) the amount of sugar (c) the same bottles (d) the water temperature
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a mirror (d) warm water
17. 17.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
18. 18.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) time (d) salt
19. 19.True or false: a comb is needed for the yeast balloon. (a) True (b) False
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) sugar (d) warm water
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) True (b) False
22. 22.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
23. 23.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time
24. 24.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold water is heavy (d) cold slows yeast down
25. 25.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.True or false: time is something yeast does not need. (a) False (b) True
27. 27.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it grows much faster (d) it bursts at once
28. 28.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) steam (d) smoke
29. 29.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) warm water (d) a magnet
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the water temperature (c) the same bottles (d) the amount of sugar
31. 31.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
32. 32.True or false: a magnet is something yeast needs. (a) True (b) False
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 sugar”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) sunlight (d) vinegar
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
36. 36.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
37. 37.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
38. 38.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) a magnet (d) sugar
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a comb (c) a balloon (d) sugar
40. 40.⚖️ 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 keep it the same (c) we measure it

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids