Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 342 · 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 mirror (b) turmeric powder (c) a comb (d) a balloon
2. 2.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
3. 3.⚖️ 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 measure it (b) we keep it the same (c) we change it
4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
5. 5.⚖️ 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) True (b) False
6. 6.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it sweet (c) to make it heavy (d) to colour it
7. 7.🔍 Which is the odd one out? (a) time (b) vinegar (c) sunlight (d) salt
8. 8.⚖️ 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) size of the balloon (c) the water temperature (d) the same bottles
9. 9.⚖️ 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) False (b) True
10. 10.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) vinegar (d) salt
11. 11.⚖️ 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
12. 12.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) vinegar (d) sugar
13. 13.⚖️ 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
14. 14.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sunlight (d) warm water
15. 15.True or false: time is something yeast needs. (a) False (b) True
16. 16.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of salt (d) a kind of sugar
17. 17.True or false: vinegar is something yeast needs. (a) False (b) True
18. 18.True or false: salt is something yeast does not need. (a) False (b) True
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
20. 20.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
21. 21.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) warm water (d) a paper clip
22. 22.True or false: a magnet is something yeast needs. (a) True (b) False
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a small bottle (d) a magnet
24. 24.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
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 water”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold makes it pink (d) cold kills sugar
27. 27.⚖️ 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 measure it (b) we change it (c) we keep it the same
28. 28.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) warm water (d) dry yeast
30. 30.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) sugar (c) warm water (d) a small bottle
33. 33.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) put it in your mouth (d) keep it for a month
34. 34.⚖️ 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 keep it the same (b) we change it (c) we measure it
35. 35.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) sugar (d) time
36. 36.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
38. 38.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
39. 39.🔍 Which is the odd one out? (a) time (b) salt (c) warm water (d) sugar
40. 40.True or false: warm water is needed for the yeast balloon. (a) False (b) True

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