Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 474 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) warm water (d) a balloon
2. 2.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
3. 3.⚖️ 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
4. 4.True or false: warm water is something yeast needs. (a) True (b) False
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a comb (c) dry yeast (d) a balloon
6. 6.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to colour rice (d) to wash dishes
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) dry yeast (d) a magnet
8. 8.⚖️ 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) False (b) True
9. 9.True or false: vinegar is something yeast needs. (a) False (b) True
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) warm water (c) sugar (d) a balloon
11. 11.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
12. 12.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a balloon (c) a battery cell (d) a paper clip
13. 13.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
14. 14.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) salt (d) time
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) True (b) False
16. 16.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
18. 18.⚖️ 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 keep it the same (c) we measure it
19. 19.True or false: a magnet is something yeast does not need. (a) False (b) True
20. 20.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
21. 21.⚖️ 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) True (b) False
22. 22.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) warm water (d) a magnet
23. 23.⚖️ 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) False (b) True
24. 24.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) time (d) sugar
25. 25.⚖️ 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
26. 26.⚖️ 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) the amount of water (c) the water temperature (d) the same bottles
27. 27.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
28. 28.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
29. 29.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) steam (d) carbon dioxide gas
30. 30.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it grows very little (d) it bursts at once
31. 31.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to colour it (c) to make it heavy (d) to make it sweet
32. 32.⚖️ 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 change it (b) we measure it (c) we keep it the same
33. 33.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
34. 34.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of sugar (d) a kind of salt
35. 35.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) vinegar (d) sugar
36. 36.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) it turns to bread (d) the balloon is bigger
37. 37.True or false: sugar is something yeast needs. (a) False (b) True
38. 38.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
40. 40.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed

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