Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 397 · 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.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
2. 2.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
3. 3.⚖️ 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) True (b) False
4. 4.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) sugar (d) time
5. 5.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) sugar (d) time
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the same bottles (c) the water temperature
7. 7.⚖️ 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 amount of yeast (c) the amount of water (d) size of the balloon
8. 8.True or false: a magnet is something yeast needs. (a) True (b) False
9. 9.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) dry yeast (d) sugar
11. 11.⚖️ 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 yeast (b) the amount of sugar (c) the water temperature (d) the same bottles
12. 12.🍞 Which of these is something yeast does not need? (a) warm water (b) vinegar (c) time (d) sugar
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
14. 14.⚖️ 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 change it (c) we measure it
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.⚖️ 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
17. 17.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) salt (d) time
18. 18.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
19. 19.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) warm water (c) sugar (d) dry yeast
21. 21.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a mirror (d) a balloon
23. 23.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) a magnet (d) sugar
24. 24.🔍 Which is the odd one out? (a) time (b) sugar (c) sunlight (d) warm water
25. 25.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
26. 26.⚖️ 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
27. 27.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.True or false: sugar is something yeast needs. (a) False (b) True
29. 29.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) sunlight (d) salt
30. 30.True or false: salt is something yeast needs. (a) False (b) True
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a magnet (d) a balloon
32. 32.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) warm water (d) a magnet
33. 33.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
34. 34.True or false: warm water is something yeast needs. (a) False (b) True
35. 35.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
36. 36.🍞 Why do we add sugar to the yeast? (a) to colour it (b) it is food for yeast (c) to make it heavy (d) to make it sweet
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) dry yeast (d) a mirror
38. 38.⚖️ 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 water (b) size of the balloon (c) the water temperature
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.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) it turns to sugar (d) the yeast is killed

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