Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 166 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) a small bottle (d) dry yeast
2. 2.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) sugar (d) warm water
3. 3.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) sugar (d) a comb
6. 6.⚖️ 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 change it (b) we measure it (c) we keep it the same
7. 7.🔮 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
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a comb (c) a balloon (d) sugar
9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
10. 10.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
12. 12.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) salt (d) sunlight
13. 13.⚖️ 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
14. 14.⚖️ 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 water temperature (b) the amount of sugar (c) size of the balloon (d) the amount of water
15. 15.🍞 Which of these is something yeast does not need? (a) sunlight (b) warm water (c) time (d) sugar
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
17. 17.⚖️ 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) size of the balloon (c) the amount of water (d) the same bottles
18. 18.⚖️ 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 keep it the same (b) we measure it (c) we change it
19. 19.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
21. 21.⚖️ 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
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) turmeric powder (d) dry yeast
23. 23.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
24. 24.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to make bread rise (d) to colour rice
25. 25.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
26. 26.True or false: warm water is something yeast does not need. (a) True (b) False
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) warm water (d) sugar
28. 28.🔍 Which is the odd one out? (a) sugar (b) time (c) sunlight (d) warm water
29. 29.🔍 Which is the odd one out? (a) warm water (b) sugar (c) salt (d) time
30. 30.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
31. 31.True or false: salt is something yeast does not need. (a) False (b) True
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a comb (d) dry yeast
33. 33.True or false: sugar is something yeast does not need. (a) False (b) True
34. 34.⚖️ 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) True (b) False
35. 35.True or false: vinegar is something yeast needs. (a) False (b) True
36. 36.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to colour it (c) to make it sweet (d) it is food for yeast
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
38. 38.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.🔍 Which is the odd one out? (a) salt (b) vinegar (c) sunlight (d) warm water
40. 40.⚖️ 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) True (b) False

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