Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 336 · 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 is the odd one out? (a) warm water (b) a magnet (c) sunlight (d) salt
2. 2.⚖️ 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 change it (c) we measure it
3. 3.True or false: sunlight is something yeast needs. (a) True (b) False
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) warm water (d) a paper clip
5. 5.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
6. 6.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
7. 7.⚖️ 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 measure it (c) we keep it the same
8. 8.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) time (d) warm water
9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) the balloon is smaller (d) it shrinks to nothing
10. 10.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
11. 11.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a paper clip (c) a magnet (d) a battery cell
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) True (b) False
13. 13.True or false: sugar is something yeast does not need. (a) True (b) False
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
15. 15.True or false: salt is something yeast needs. (a) True (b) False
16. 16.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) sugar (d) a magnet
17. 17.⚖️ 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 amount of yeast (c) the amount of water (d) the same bottles
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) warm water (d) a mirror
19. 19.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
20. 20.True or false: warm water is needed for the yeast balloon. (a) True (b) False
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a small bottle (d) turmeric powder
25. 25.⚖️ 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) False (b) True
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a magnet (c) turmeric powder (d) a mirror
27. 27.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a mirror (c) turmeric powder (d) a battery cell
28. 28.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold makes it pink (d) cold water is heavy
29. 29.⚖️ 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
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) dry yeast (c) a balloon (d) warm water
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the same bottles (c) size of the balloon (d) the amount of water
32. 32.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a battery cell (d) sugar
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) dry yeast (c) a balloon (d) warm water
35. 35.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
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? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
39. 39.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
40. 40.🍞 Which of these is something yeast does not need? (a) vinegar (b) time (c) sugar (d) warm water

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