Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 293 · 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.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
2. 2.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) time (d) warm water
3. 3.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
4. 4.⚖️ 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) the water temperature (c) the amount of sugar (d) the amount of yeast
5. 5.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
6. 6.True or false: warm water is something yeast needs. (a) True (b) False
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) a small bottle (d) a magnet
8. 8.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) vinegar (d) sugar
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) dry yeast (d) a mirror
10. 10.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold slows yeast down (d) cold makes it pink
14. 14.⚖️ 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
15. 15.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
16. 16.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) time (d) salt
17. 17.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
18. 18.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) sunlight (d) a magnet
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) sugar (d) warm water
21. 21.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is smaller (d) the balloon is bigger
22. 22.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
23. 23.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
24. 24.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) a magnet (d) warm water
25. 25.⚖️ 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 sugar (c) the amount of water (d) the amount of yeast
26. 26.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
27. 27.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) turmeric powder (d) sugar
29. 29.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
30. 30.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
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 kept the same. (a) False (b) True
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) warm water (c) a balloon (d) sugar
33. 33.🔍 Which is the odd one out? (a) salt (b) sugar (c) time (d) warm water
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a comb (d) a balloon
35. 35.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
36. 36.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
37. 37.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
38. 38.⚖️ 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 change it (c) we keep it the same
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) a magnet (d) dry yeast
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a balloon (d) a battery cell

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