Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 299 · 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 same bottles (b) size of the balloon (c) the amount of sugar (d) the water temperature
2. 2.⚖️ 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
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) dry yeast (d) a paper clip
5. 5.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) a magnet (d) a comb
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a mirror (d) dry yeast
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) dry yeast (d) a balloon
9. 9.🔍 Which is the odd one out? (a) salt (b) vinegar (c) warm water (d) sunlight
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
11. 11.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) vinegar (d) warm water
12. 12.🔍 Which is the odd one out? (a) warm water (b) sugar (c) a magnet (d) time
13. 13.True or false: sugar is something yeast needs. (a) False (b) True
14. 14.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a small bottle (d) warm water
16. 16.⚖️ 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
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) turmeric powder (d) sugar
18. 18.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
19. 19.⚖️ 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
20. 20.🔍 Which is the odd one out? (a) salt (b) sugar (c) a magnet (d) vinegar
21. 21.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a small bottle (d) a comb
22. 22.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
23. 23.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sunlight (d) sugar
24. 24.⚖️ 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 measure it (b) we change it (c) we keep it the same
25. 25.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.⚖️ 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
27. 27.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
28. 28.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
29. 29.⚖️ 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) True (b) False
30. 30.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
31. 31.⚖️ 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
32. 32.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
33. 33.⚖️ 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 keep it the same (c) we measure it
34. 34.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) dry yeast (c) a mirror (d) a magnet
36. 36.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
37. 37.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a magnet (d) warm water
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) warm water (d) sugar
39. 39.True or false: warm water is something yeast needs. (a) True (b) False
40. 40.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True

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