Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 415 · 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.⚖️ 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
2. 2.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a balloon (c) warm water (d) sugar
4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
5. 5.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a comb (d) dry yeast
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a balloon (d) a comb
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) warm water (c) sugar (d) dry yeast
9. 9.⚖️ 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 measure it (c) we change it
10. 10.⚖️ 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 change it (c) we keep it the same
11. 11.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
12. 12.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) warm water (c) dry yeast (d) a balloon
14. 14.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a magnet (d) warm water
16. 16.🍞 Which of these is something yeast needs? (a) salt (b) time (c) a magnet (d) sunlight
17. 17.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
18. 18.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) smoke (d) air from outside
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) warm water (d) a battery cell
20. 20.True or false: time is something yeast needs. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) warm water (b) salt (c) vinegar (d) sunlight
22. 22.True or false: vinegar is something yeast does not need. (a) False (b) True
23. 23.⚖️ 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 change it (b) we measure it (c) we keep it the same
24. 24.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
25. 25.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) salt (d) sugar
26. 26.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold water is heavy (d) cold slows yeast down
27. 27.True or false: warm water is something yeast needs. (a) False (b) True
28. 28.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
29. 29.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) warm water (d) sugar
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
33. 33.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the water temperature (c) the amount of sugar (d) the amount of yeast
35. 35.True or false: sunlight is something yeast needs. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) vinegar
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
38. 38.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
39. 39.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
40. 40.True or false: a magnet is something yeast needs. (a) True (b) False

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