Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 508 · 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 paper clip is needed for the yeast balloon. (a) False (b) True
2. 2.True or false: salt is something yeast does not need. (a) True (b) False
3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) put it in your mouth (d) keep it for a month
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) False (b) True
5. 5.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
6. 6.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) time (d) sugar
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) dry yeast (c) a paper clip (d) a magnet
8. 8.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) a magnet (d) sugar
9. 9.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.True or false: salt is something yeast needs. (a) False (b) True
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a balloon (d) a mirror
12. 12.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
13. 13.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
14. 14.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
15. 15.⚖️ 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
16. 16.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a tiny living fungus (d) a kind of sugar
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) dry yeast (d) a battery cell
18. 18.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) the yeast is killed (d) it turns to sugar
19. 19.True or false: sugar is needed for the yeast balloon. (a) True (b) False
20. 20.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) steam (d) carbon dioxide gas
21. 21.🔍 Which is the odd one out? (a) salt (b) warm water (c) sunlight (d) vinegar
22. 22.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
23. 23.⚖️ 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
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) a balloon (d) dry yeast
25. 25.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a small bottle (d) a magnet
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a magnet (d) dry yeast
28. 28.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sugar (d) time
29. 29.⚖️ 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 keep it the same (b) we change it (c) we measure it
30. 30.True or false: sunlight is something yeast needs. (a) True (b) False
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 amount of sugar (c) the amount of water (d) size of the balloon
32. 32.⚖️ 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) True (b) False
33. 33.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) a magnet (d) vinegar
34. 34.🔍 Which is the odd one out? (a) salt (b) time (c) vinegar (d) a magnet
35. 35.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold slows yeast down (d) cold water is heavy
36. 36.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
38. 38.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) to make it heavy (d) it is food for yeast
39. 39.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.⚖️ 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 keep it the same (c) we change it

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