Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 328 · 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.True or false: time is something yeast needs. (a) False (b) True
2. 2.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) a balloon (d) sugar
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) a paper clip (d) sugar
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a small bottle (d) a mirror
6. 6.⚖️ 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 measure it (b) we keep it the same (c) we change it
7. 7.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
8. 8.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
9. 9.🍞 Which of these is something yeast needs? (a) warm water (b) a magnet (c) vinegar (d) sunlight
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
11. 11.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) sugar (c) a magnet (d) turmeric powder
14. 14.⚖️ 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
15. 15.⚖️ 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) the amount of yeast (c) size of the balloon (d) the amount of water
16. 16.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
17. 17.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sunlight (d) salt
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) dry yeast (c) a small bottle (d) warm water
19. 19.⚖️ 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
20. 20.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of sugar (d) a kind of stone
21. 21.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) a magnet (d) vinegar
22. 22.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.🛟 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
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
25. 25.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
26. 26.⚖️ 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
27. 27.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) warm water (d) sugar
28. 28.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
29. 29.⚖️ 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
30. 30.⚖️ 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
31. 31.True or false: warm water is something yeast needs. (a) False (b) True
32. 32.True or false: vinegar is something yeast needs. (a) True (b) False
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) dry yeast (d) a mirror
34. 34.⚖️ 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
35. 35.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) sugar (b) warm water (c) sunlight (d) time
37. 37.⚖️ 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) False (b) True
38. 38.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
39. 39.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
40. 40.🔍 Which is the odd one out? (a) time (b) salt (c) warm water (d) sugar

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