Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 393 · 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.🍞 Which of these is something yeast needs? (a) salt (b) time (c) sunlight (d) vinegar
2. 2.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
3. 3.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) vinegar
4. 4.True or false: sugar is something yeast needs. (a) False (b) True
5. 5.⚖️ 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
6. 6.⚖️ 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 amount of sugar (b) the water temperature (c) the amount of yeast (d) the same bottles
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a comb (c) turmeric powder (d) a magnet
8. 8.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) salt (d) sunlight
9. 9.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) sugar (d) salt
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) a small bottle (d) warm water
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.⚖️ 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) False (b) True
13. 13.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
14. 14.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
15. 15.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
16. 16.True or false: warm water is something yeast needs. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) turmeric powder (d) a small bottle
19. 19.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
21. 21.True or false: time is something yeast needs. (a) False (b) True
22. 22.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to clean floors (d) to colour rice
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the same bottles (c) the amount of sugar (d) size of the balloon
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
26. 26.True or false: salt is something yeast needs. (a) True (b) False
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) warm water (d) a battery cell
28. 28.True or false: warm water is needed for the yeast balloon. (a) True (b) False
29. 29.⚖️ 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 keep it the same (b) we change it (c) we measure it
30. 30.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
32. 32.🧺 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 magnet
33. 33.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) a balloon (d) dry yeast
35. 35.True or false: vinegar is something yeast does not need. (a) True (b) False
36. 36.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
37. 37.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) salt
38. 38.🔍 Which is the odd one out? (a) sugar (b) time (c) sunlight (d) warm water
39. 39.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
40. 40.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it

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