Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 412 · 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 what we measure? (a) the amount of sugar (b) the amount of yeast (c) the water temperature (d) size of the balloon
2. 2.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) dry yeast (c) a paper clip (d) turmeric powder
5. 5.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
6. 6.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
7. 7.⚖️ 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 water (c) size of the balloon
8. 8.True or false: time is something yeast needs. (a) True (b) False
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) warm water (d) a comb
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 water”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.⚖️ 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) the water temperature (c) the amount of water (d) size of the balloon
13. 13.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
14. 14.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
15. 15.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) sugar (d) a magnet
17. 17.⚖️ 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
18. 18.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
19. 19.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
20. 20.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a magnet (d) warm water
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) turmeric powder (c) a small bottle (d) a balloon
22. 22.🔍 Which is the odd one out? (a) salt (b) vinegar (c) a magnet (d) warm water
23. 23.🔮 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 bigger (d) the balloon is smaller
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a battery cell (d) a balloon
25. 25.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a battery cell (c) a balloon (d) a paper clip
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a balloon (c) dry yeast (d) a small bottle
27. 27.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) salt (d) time
28. 28.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) time (d) salt
29. 29.⚖️ 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 measure it (c) we change it
30. 30.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
31. 31.⚖️ 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
32. 32.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
33. 33.True or false: warm water is something yeast needs. (a) True (b) False
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we keep it the same (c) we change it
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a comb (c) sugar (d) warm water
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) a comb (d) turmeric powder
37. 37.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) vinegar (d) sugar
38. 38.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) vinegar (d) time
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) turmeric powder (d) warm water
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a paper clip (d) dry yeast

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