Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 923 · 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) the amount of sugar (c) the amount of yeast (d) size of the balloon
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sunlight (d) sugar
4. 4.True or false: salt is something yeast needs. (a) True (b) False
5. 5.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
6. 6.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) a magnet (d) salt
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
8. 8.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to colour rice (c) to wash dishes (d) to make bread rise
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) dry yeast (d) a balloon
11. 11.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
12. 12.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) ice cold (d) very salty
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a mirror (d) warm water
14. 14.⚖️ 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
15. 15.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) put it in your mouth (d) keep it for a month
16. 16.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
17. 17.True or false: sugar is needed for the yeast balloon. (a) False (b) True
18. 18.⚖️ 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 amount of water (c) the water temperature (d) the amount of yeast
19. 19.🔍 Which is the odd one out? (a) sugar (b) time (c) sunlight (d) warm water
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a comb (d) a balloon
21. 21.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) time (b) a magnet (c) sugar (d) warm water
23. 23.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) sugar (d) a mirror
25. 25.True or false: vinegar is something yeast does not need. (a) False (b) True
26. 26.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
27. 27.True or false: sunlight is something yeast needs. (a) True (b) False
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a mirror (c) a battery cell (d) a comb
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a small bottle (d) a comb
30. 30.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
31. 31.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.🔍 Which is the odd one out? (a) salt (b) sunlight (c) time (d) vinegar
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) dry yeast (d) a magnet
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) turmeric powder (d) dry yeast
35. 35.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
36. 36.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) air from outside (c) steam (d) smoke
37. 37.True or false: time is something yeast does not need. (a) True (b) False
38. 38.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
39. 39.⚖️ 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 measure it (c) we keep it the same
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 same bottles (b) size of the balloon (c) the water temperature

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