Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 443 · 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 is the odd one out? (a) warm water (b) time (c) sugar (d) a magnet
2. 2.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) carbon dioxide gas (d) air from outside
3. 3.True or false: warm water is something yeast needs. (a) True (b) False
4. 4.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
5. 5.🔍 Which is the odd one out? (a) time (b) sunlight (c) salt (d) vinegar
6. 6.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
7. 7.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
8. 8.🍞 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
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) a comb (d) dry yeast
10. 10.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
11. 11.🛟 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
12. 12.⚖️ 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) False (b) True
13. 13.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) the water temperature (c) size of the balloon
18. 18.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) a magnet
19. 19.⚖️ 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 same bottles (d) size of the balloon
20. 20.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) sunlight
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a battery cell (d) dry yeast
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a paper clip (d) sugar
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 kept the same. (a) True (b) False
25. 25.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
26. 26.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) sunlight (d) salt
27. 27.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
28. 28.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) sunlight
30. 30.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to clean floors (d) to wash dishes
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a paper clip (c) a mirror (d) dry yeast
32. 32.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
33. 33.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.⚖️ 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
35. 35.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) salt (d) warm water
36. 36.⚖️ 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) 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 yeast is kept the same. (a) False (b) True
38. 38.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) a comb (d) turmeric powder
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) sugar (c) a paper clip (d) a mirror

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