Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 120 · 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 not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a paper clip (d) warm water
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) warm water (d) a battery cell
3. 3.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sunlight (d) sugar
4. 4.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
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) False (b) True
6. 6.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) sunlight
7. 7.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
8. 8.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) dry yeast (c) a comb (d) a mirror
9. 9.True or false: time is something yeast does not need. (a) False (b) True
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a magnet (c) a small bottle (d) warm water
11. 11.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
12. 12.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
13. 13.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a paper clip (d) warm water
15. 15.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) sugar (c) a battery cell (d) a paper clip
16. 16.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
17. 17.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
18. 18.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
19. 19.⚖️ 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
20. 20.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold slows yeast down (d) cold kills sugar
21. 21.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) vinegar
22. 22.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
23. 23.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to colour rice (d) to wash dishes
24. 24.⚖️ 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
25. 25.🔍 Which is the odd one out? (a) a magnet (b) salt (c) warm water (d) vinegar
26. 26.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once
27. 27.⚖️ 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
28. 28.True or false: a magnet is something yeast needs. (a) False (b) True
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a mirror (d) a balloon
30. 30.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
31. 31.True or false: sunlight is something yeast needs. (a) False (b) True
32. 32.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
33. 33.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is bigger (d) the balloon is smaller
34. 34.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
35. 35.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) warm water (d) a magnet
36. 36.⚖️ 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
37. 37.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
38. 38.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) salt
39. 39.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a paper clip (c) warm water (d) a comb
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 yeast”? (a) we change it (b) we measure it (c) we keep it the same

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