Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 703 · 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 needed for the yeast balloon? (a) a mirror (b) a magnet (c) a paper clip (d) sugar
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the same bottles (c) the water temperature
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.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
6. 6.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
8. 8.⚖️ 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 water temperature (b) size of the balloon (c) the amount of yeast (d) the amount of water
9. 9.🔍 Which is the odd one out? (a) sugar (b) time (c) sunlight (d) warm water
10. 10.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to clean floors (d) to make bread rise
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a mirror (d) a small bottle
12. 12.True or false: sugar is needed for the yeast balloon. (a) True (b) False
13. 13.⚖️ 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
14. 14.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) warm water (d) sugar
15. 15.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
16. 16.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a small bottle (c) a balloon (d) sugar
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) size of the balloon (c) the same bottles (d) the water temperature
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) a magnet (d) a battery cell
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) a mirror (d) dry yeast
21. 21.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) time (d) salt
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🧺 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 comb
24. 24.True or false: a magnet is something yeast needs. (a) False (b) True
25. 25.⚖️ 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
26. 26.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) time (d) warm water
27. 27.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
28. 28.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) vinegar (d) sunlight
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) warm water (d) a balloon
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 yeast”? (a) we keep it the same (b) we measure it (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 amount of water is the one thing we change. (a) False (b) True
32. 32.🔮 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
33. 33.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.True or false: sunlight is something yeast needs. (a) True (b) False
35. 35.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
36. 36.🔍 Which is the odd one out? (a) salt (b) warm water (c) a magnet (d) sunlight
37. 37.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a balloon (d) a paper clip
40. 40.⚖️ 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

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