Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 649 · 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 paper clip (b) turmeric powder (c) a magnet (d) a small bottle
2. 2.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
3. 3.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) a paper clip (d) turmeric powder
4. 4.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a small bottle (d) a comb
6. 6.🔍 Which is the odd one out? (a) time (b) sunlight (c) a magnet (d) salt
7. 7.⚖️ 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 yeast (b) the amount of sugar (c) the amount of water (d) size of the balloon
8. 8.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
9. 9.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
13. 13.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it heavy (c) to colour it (d) to make it sweet
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a magnet (d) a small bottle
15. 15.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
16. 16.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
17. 17.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) sugar (c) a balloon (d) a small bottle
19. 19.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
20. 20.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🔍 Which is the odd one out? (a) time (b) sunlight (c) sugar (d) warm water
22. 22.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) a magnet (d) vinegar
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
27. 27.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) it shrinks to nothing (d) the balloon is bigger
28. 28.True or false: sugar is something yeast needs. (a) False (b) True
29. 29.⚖️ 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
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) dry yeast (d) a battery cell
31. 31.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
32. 32.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
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 keep it the same (b) we change it (c) we measure it
34. 34.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a small bottle (d) a mirror
36. 36.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
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 yeast”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) salt (d) vinegar
39. 39.🧺 Do we need a mirror 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 what we measure. (a) True (b) False

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