Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 373 · 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) a small bottle
2. 2.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) salt
4. 4.True or false: warm water is something yeast does not need. (a) True (b) False
5. 5.⚖️ 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 water
6. 6.True or false: a magnet is something yeast needs. (a) True (b) False
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a comb (d) dry yeast
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) True (b) False
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) turmeric powder (d) warm water
10. 10.🍞 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
11. 11.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.True or false: a magnet is something yeast does not need. (a) True (b) False
13. 13.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) a battery cell (d) sugar
15. 15.🔍 Which is the odd one out? (a) time (b) sunlight (c) a magnet (d) vinegar
16. 16.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it turns to sugar (d) it glows
17. 17.True or false: warm water is needed for the yeast balloon. (a) True (b) False
18. 18.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) a magnet
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a paper clip (d) warm water
20. 20.⚖️ 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
21. 21.⚖️ 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 keep it the same (b) we change it (c) we measure it
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a mirror (c) a small bottle (d) sugar
23. 23.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of yeast (c) size of the balloon (d) the water temperature
25. 25.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) dry yeast (d) a comb
27. 27.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
28. 28.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
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? What do we do with “the amount of sugar”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) a magnet (d) sugar
33. 33.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a magnet (d) a balloon
35. 35.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
36. 36.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
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) True (b) False
38. 38.🔍 Which is the odd one out? (a) salt (b) vinegar (c) sunlight (d) sugar
39. 39.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) a small bottle (d) sugar

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