Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 804 · 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.⚖️ 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 water temperature (c) the amount of yeast
2. 2.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
3. 3.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
4. 4.⚖️ 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 keep it the same (c) we measure it
5. 5.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) sunlight
6. 6.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.⚖️ 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 measure it (b) we change it (c) we keep it the same
8. 8.⚖️ 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 keep it the same (b) we change it (c) we measure it
9. 9.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) vinegar
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a mirror (d) sugar
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) turmeric powder (d) warm water
13. 13.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
14. 14.True or false: a comb is needed for the yeast balloon. (a) False (b) True
15. 15.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
16. 16.True or false: warm water is something yeast needs. (a) False (b) True
17. 17.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a mirror (c) a small bottle (d) warm water
19. 19.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
20. 20.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) dry yeast (d) sugar
22. 22.⚖️ 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) False (b) True
23. 23.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
24. 24.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
25. 25.⚖️ 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) False (b) True
26. 26.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is bigger (d) the balloon is smaller
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) a magnet (d) a small bottle
28. 28.True or false: salt is something yeast needs. (a) True (b) False
29. 29.⚖️ 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
30. 30.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
31. 31.True or false: sunlight is something yeast needs. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) a battery cell (d) dry yeast
34. 34.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
35. 35.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
36. 36.🔮 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
37. 37.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) a magnet (d) salt
38. 38.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) time (d) sugar
40. 40.True or false: a magnet is needed for the yeast balloon. (a) False (b) True

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