Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 108 · 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 magnet is something yeast does not need. (a) True (b) False
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a magnet (d) dry yeast
3. 3.⚖️ 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
4. 4.True or false: vinegar is something yeast does not need. (a) False (b) True
5. 5.⚖️ 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) True (b) False
6. 6.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
7. 7.⚖️ 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 yeast (b) size of the balloon (c) the water temperature
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) warm water (d) a small bottle
9. 9.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
10. 10.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to colour it (c) it is food for yeast (d) to make it sweet
11. 11.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) carbon dioxide gas (d) steam
12. 12.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
13. 13.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone
14. 14.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) warm water (d) sugar
15. 15.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) a magnet (d) time
16. 16.⚖️ 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 amount of water (c) the water temperature (d) the same bottles
17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
18. 18.True or false: sunlight is something yeast does not need. (a) False (b) True
19. 19.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
20. 20.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) sunlight (d) salt
22. 22.🔍 Which is the odd one out? (a) time (b) sunlight (c) warm water (d) sugar
23. 23.⚖️ 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
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) dry yeast (d) a magnet
25. 25.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
26. 26.⚖️ 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
27. 27.⚖️ 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 keep it the same (c) we measure it
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the same bottles
29. 29.True or false: sugar is something yeast needs. (a) True (b) False
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.True or false: salt is something yeast does not need. (a) True (b) False
33. 33.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) time (d) sugar
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a comb (c) a balloon (d) dry yeast
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a balloon (d) turmeric powder
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) dry yeast (d) a mirror
37. 37.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) a magnet (d) vinegar
38. 38.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
40. 40.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False

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