Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 694 · 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 amount of yeast (b) size of the balloon (c) the amount of sugar (d) the same bottles
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) a balloon (d) dry yeast
3. 3.⚖️ 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
4. 4.True or false: time is something yeast needs. (a) True (b) False
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 what we measure. (a) False (b) True
6. 6.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to colour rice (d) to clean floors
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) sugar (c) dry yeast (d) a small bottle
8. 8.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) sunlight (d) salt
9. 9.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) warm water (d) sugar
11. 11.🍞 Which of these is something yeast needs? (a) time (b) a magnet (c) sunlight (d) salt
12. 12.🍞 Which of these is something yeast needs? (a) warm water (b) vinegar (c) sunlight (d) a magnet
13. 13.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
14. 14.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) sunlight
15. 15.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) time (b) warm water (c) salt (d) sugar
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a balloon (c) sugar (d) a small bottle
18. 18.⚖️ 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 keep it the same (c) we change it
19. 19.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
20. 20.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
21. 21.⚖️ 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
22. 22.⚖️ 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) size of the balloon (c) the amount of water
23. 23.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.True or false: warm water is needed for the yeast balloon. (a) True (b) False
25. 25.⚖️ 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
26. 26.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it bursts at once (d) it grows very little
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a small bottle (c) a battery cell (d) a comb
28. 28.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it turns to sugar (d) it grows faster
29. 29.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) warm water
30. 30.True or false: warm water is something yeast does not need. (a) True (b) False
31. 31.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
32. 32.True or false: warm water is something yeast needs. (a) True (b) False
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) False (b) True
34. 34.⚖️ 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
35. 35.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) a magnet (d) time
36. 36.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
37. 37.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) dry yeast (d) a battery cell
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) a paper clip (d) warm water
40. 40.True or false: sugar is something yeast does not need. (a) False (b) True

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