Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 866 · 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: a magnet is not needed for the yeast balloon. (a) False (b) True
2. 2.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) sunlight (d) vinegar
3. 3.🔍 Which is the odd one out? (a) a magnet (b) time (c) vinegar (d) sunlight
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a mirror (d) warm water
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) dry yeast (c) warm water (d) a small bottle
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) a small bottle (d) a comb
7. 7.⚖️ 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 water temperature (c) the amount of sugar (d) the same bottles
8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) it turns to bread (d) the balloon is bigger
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 yeast”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
11. 11.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
12. 12.True or false: vinegar is something yeast does not need. (a) False (b) True
13. 13.⚖️ 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) size of the balloon (c) the same bottles (d) the amount of water
14. 14.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) sunlight
15. 15.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
16. 16.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a magnet (d) warm water
17. 17.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
18. 18.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
19. 19.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) warm water (c) dry yeast (d) a balloon
21. 21.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) sugar (d) a mirror
22. 22.🔍 Which is the odd one out? (a) salt (b) sugar (c) sunlight (d) a magnet
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) dry yeast (d) a comb
24. 24.⚖️ 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) False (b) True
25. 25.🔍 Which is the odd one out? (a) time (b) sugar (c) sunlight (d) warm water
26. 26.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
27. 27.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
28. 28.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
29. 29.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
30. 30.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to colour it (c) to make it sweet (d) it is food for yeast
31. 31.🍞 Which of these is something yeast does not need? (a) vinegar (b) sugar (c) warm water (d) time
32. 32.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a battery cell (c) dry yeast (d) a small bottle
33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
34. 34.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
35. 35.⚖️ 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 keep it the same (c) we measure it
36. 36.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
37. 37.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
39. 39.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) vinegar (d) sunlight
40. 40.⚖️ 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) False (b) True

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