Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 602 · 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) sugar (b) vinegar (c) time (d) warm water
2. 2.⚖️ 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
3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a mirror (c) a small bottle (d) a balloon
5. 5.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a magnet (d) a small bottle
7. 7.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) sugar (d) vinegar
8. 8.⚖️ 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 measure it (b) we change it (c) we keep it the same
9. 9.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
10. 10.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
11. 11.⚖️ 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
12. 12.True or false: sunlight is something yeast needs. (a) True (b) False
13. 13.True or false: vinegar is something yeast needs. (a) True (b) False
14. 14.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) a magnet (d) salt
16. 16.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to make it sweet (d) to colour it
17. 17.🔍 Which is the odd one out? (a) time (b) sunlight (c) warm water (d) sugar
18. 18.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
19. 19.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
20. 20.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
21. 21.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a balloon (d) a battery cell
22. 22.⚖️ 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) False (b) True
23. 23.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) salt
24. 24.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) salt (d) sunlight
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 change it (b) we measure it (c) we keep it the same
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a paper clip (c) a balloon (d) warm water
27. 27.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
28. 28.⚖️ 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 same bottles (b) size of the balloon (c) the water temperature (d) the amount of sugar
29. 29.⚖️ 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 keep it the same (b) we measure it (c) we change it
30. 30.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
31. 31.True or false: a magnet is something yeast does not need. (a) False (b) True
32. 32.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) sugar (d) a comb
34. 34.True or false: a magnet is something yeast needs. (a) True (b) False
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a small bottle (d) a battery cell
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) warm water (d) a battery cell
37. 37.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
38. 38.True or false: time is something yeast does not need. (a) False (b) True
39. 39.True or false: salt is something yeast needs. (a) True (b) False
40. 40.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) smoke (d) carbon dioxide gas

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