Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 179 · 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) warm water (b) a comb (c) a balloon (d) dry yeast
2. 2.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.⚖️ 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
4. 4.⚖️ 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) False (b) True
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) warm water (d) dry yeast
6. 6.True or false: warm water is something yeast needs. (a) False (b) True
7. 7.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) air from outside (d) smoke
8. 8.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) warm water (c) a battery cell (d) a comb
9. 9.True or false: sugar is something yeast needs. (a) True (b) False
10. 10.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) warm water (c) sugar (d) a small bottle
13. 13.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) salt (d) sunlight
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a paper clip (c) a small bottle (d) dry yeast
15. 15.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
16. 16.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) sugar (d) turmeric powder
18. 18.🔍 Which is the odd one out? (a) salt (b) time (c) sugar (d) warm water
19. 19.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
20. 20.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
21. 21.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
22. 22.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it turns yellow (d) it grows much faster
23. 23.⚖️ 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 keep it the same (b) we measure it (c) we change it
24. 24.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
25. 25.🔮 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 smaller (d) the balloon is bigger
26. 26.🔍 Which is the odd one out? (a) sunlight (b) salt (c) a magnet (d) sugar
27. 27.⚖️ 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 water temperature
28. 28.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) turmeric powder (d) a mirror
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) warm water (c) a balloon (d) dry yeast
30. 30.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
31. 31.🍞 Which of these is something yeast does not need? (a) salt (b) warm water (c) time (d) sugar
32. 32.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
33. 33.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) sugar (d) time
35. 35.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.⚖️ 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) True (b) False
38. 38.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
40. 40.⚖️ 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

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