Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 959 · 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.True or false: a comb is needed for the yeast balloon. (a) False (b) True
2. 2.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
3. 3.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) a magnet (d) vinegar
4. 4.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
5. 5.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
6. 6.🍞 Does yeast need a magnet 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 amount of sugar”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🍞 Which of these is something yeast does not need? (a) salt (b) sugar (c) warm water (d) time
9. 9.🔍 Which is the odd one out? (a) sugar (b) time (c) sunlight (d) warm water
10. 10.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it grows much faster (d) it turns yellow
11. 11.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) sugar (d) salt
12. 12.True or false: sugar is something yeast needs. (a) True (b) False
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) warm water (c) a balloon (d) a small bottle
14. 14.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a balloon (d) a battery cell
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) sugar (d) a paper clip
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 sugar (b) the same bottles (c) the amount of water (d) size of the balloon
19. 19.True or false: sugar is something yeast does not need. (a) True (b) False
20. 20.⚖️ 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 keep it the same (b) we change it (c) we measure it
21. 21.⚖️ 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
22. 22.⚖️ 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) the water temperature (c) size of the balloon
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a small bottle (d) sugar
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a mirror (c) warm water (d) a balloon
25. 25.⚖️ 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 amount of yeast (b) size of the balloon (c) the same bottles (d) the water temperature
26. 26.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
27. 27.True or false: sugar is needed for the yeast balloon. (a) True (b) False
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) a comb (d) dry yeast
29. 29.⚖️ 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 keep it the same (c) we change it
30. 30.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
31. 31.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold water is heavy (d) cold makes it pink
32. 32.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
33. 33.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
34. 34.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) it shrinks to nothing (d) the balloon is bigger
35. 35.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
36. 36.🔮 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
37. 37.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) sugar (c) warm water (d) dry yeast
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) turmeric powder (c) a balloon (d) sugar
40. 40.⚖️ 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 same bottles

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