Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 404 · 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? What do we do with “the water temperature”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.⚖️ 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 keep it the same (c) we measure it
3. 3.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a magnet (d) dry yeast
4. 4.⚖️ 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 keep it the same (c) we measure it
5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
6. 6.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
7. 7.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) turmeric powder (d) a small bottle
9. 9.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
10. 10.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) sugar (c) a small bottle (d) warm water
12. 12.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
13. 13.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of salt (d) a kind of stone
14. 14.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) salt (d) sugar
15. 15.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) vinegar (d) a magnet
16. 16.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
17. 17.True or false: warm water is something yeast needs. (a) False (b) True
18. 18.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
19. 19.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) warm water (d) salt
21. 21.⚖️ 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 keep it the same (c) we change it
22. 22.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
23. 23.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sunlight (d) sugar
24. 24.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a comb (d) warm water
26. 26.⚖️ 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) size of the balloon (b) the water temperature (c) the amount of yeast (d) the amount of sugar
27. 27.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
29. 29.⚖️ 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
30. 30.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
31. 31.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
32. 32.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
33. 33.⚖️ 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 change it (b) we keep it the same (c) we measure it
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) dry yeast (d) a small bottle
35. 35.⚖️ 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
36. 36.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) salt (d) vinegar
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a paper clip (d) a small bottle
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
39. 39.⚖️ 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
40. 40.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) salt (d) time

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