Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 406 · 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 something yeast needs? (a) salt (b) warm water (c) a magnet (d) vinegar
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a battery cell (c) dry yeast (d) a small bottle
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) True (b) False
4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
5. 5.⚖️ 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 change it (b) we measure it (c) we keep it the same
6. 6.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
7. 7.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
8. 8.⚖️ 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
9. 9.True or false: a magnet is something yeast needs. (a) True (b) False
10. 10.⚖️ 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 amount of yeast
11. 11.True or false: vinegar is something yeast does not need. (a) False (b) True
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) warm water (c) dry yeast (d) a small bottle
13. 13.🍞 Which of these is something yeast does not need? (a) sugar (b) a magnet (c) warm water (d) time
14. 14.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) vinegar (d) warm water
15. 15.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
16. 16.⚖️ 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
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a small bottle (d) turmeric powder
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) sugar (c) dry yeast (d) a balloon
19. 19.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
21. 21.True or false: a comb is needed for the yeast balloon. (a) True (b) False
22. 22.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) to colour it (d) it is food for yeast
23. 23.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to colour rice (d) to clean floors
25. 25.True or false: sunlight is something yeast needs. (a) True (b) False
26. 26.🧺 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 magnet
27. 27.🔍 Which is the odd one out? (a) vinegar (b) time (c) warm water (d) sugar
28. 28.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
29. 29.⚖️ 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 amount of yeast (c) the same bottles (d) the water temperature
30. 30.True or false: salt is something yeast does not need. (a) False (b) True
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a comb (d) a balloon
32. 32.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
33. 33.🛟 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
34. 34.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
35. 35.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) carbon dioxide gas (d) air from outside
36. 36.⚖️ 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) False (b) True
37. 37.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) it grows faster (d) the yeast is killed
38. 38.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) dry yeast (c) sugar (d) a balloon
40. 40.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it

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