Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 662 · 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: turmeric powder is needed for the yeast balloon. (a) True (b) False
2. 2.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) sugar (d) a magnet
3. 3.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
6. 6.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
7. 7.True or false: a magnet is something yeast needs. (a) True (b) False
8. 8.⚖️ 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) True (b) False
9. 9.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) vinegar (d) a magnet
10. 10.True or false: sugar is something yeast does not need. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) time (b) warm water (c) sunlight (d) sugar
12. 12.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) carbon dioxide gas (d) air from outside
13. 13.⚖️ 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) False (b) True
14. 14.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
15. 15.True or false: sugar is something yeast needs. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time
17. 17.⚖️ 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
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a paper clip (c) a magnet (d) turmeric powder
20. 20.⚖️ 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
21. 21.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
22. 22.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
24. 24.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
25. 25.⚖️ 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 change it (b) we measure it (c) we keep it the same
26. 26.True or false: warm water is something yeast does not need. (a) False (b) True
27. 27.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold
28. 28.🔮 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
29. 29.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
30. 30.⚖️ 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) the amount of sugar (c) size of the balloon
31. 31.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
32. 32.⚖️ 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 water temperature (d) the amount of yeast
33. 33.⚖️ 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 same bottles
34. 34.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
35. 35.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
36. 36.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) time (d) sugar
37. 37.True or false: sunlight is something yeast does not need. (a) True (b) False
38. 38.🔮 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
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) dry yeast (d) a balloon
40. 40.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) warm water (d) sugar

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