Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 244 · 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 amount of water”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) size of the balloon (c) the water temperature
3. 3.True or false: sugar is something yeast does not need. (a) True (b) False
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a comb (c) warm water (d) dry yeast
5. 5.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) keep it for a month (d) throw it at a wall
7. 7.True or false: salt is something yeast needs. (a) True (b) False
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
9. 9.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
10. 10.⚖️ 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
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
12. 12.⚖️ 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
13. 13.⚖️ 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
14. 14.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) sunlight
15. 15.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) warm water (d) sunlight
16. 16.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
17. 17.⚖️ 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 amount of sugar (c) the water temperature (d) the same bottles
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a magnet (d) dry yeast
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) turmeric powder (d) warm water
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) warm water (d) sugar
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water 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? True or false: the water temperature is the one thing we change. (a) False (b) True
23. 23.⚖️ 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) the amount of water (c) size of the balloon
24. 24.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) carbon dioxide gas (d) steam
25. 25.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a comb (c) a magnet (d) turmeric powder
28. 28.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) dry yeast (d) a mirror
30. 30.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) salt (d) sugar
31. 31.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.⚖️ 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
33. 33.🍞 Which of these is something yeast needs? (a) salt (b) time (c) a magnet (d) sunlight
34. 34.⚖️ 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) False (b) True
35. 35.True or false: salt is something yeast does not need. (a) False (b) True
36. 36.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) a small bottle (d) a balloon
38. 38.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) salt (d) vinegar
39. 39.⚖️ 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
40. 40.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed

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