Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 718 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) warm water (d) a comb
2. 2.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
3. 3.⚖️ 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 water temperature (c) the amount of water
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) a magnet (d) a small bottle
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) turmeric powder (d) a balloon
6. 6.🍞 Which of these is something yeast needs? (a) a magnet (b) sugar (c) vinegar (d) salt
7. 7.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
8. 8.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
9. 9.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) a magnet
10. 10.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) air from outside (d) smoke
11. 11.⚖️ 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
12. 12.🍞 Which of these is something yeast does not need? (a) warm water (b) vinegar (c) time (d) sugar
13. 13.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
14. 14.True or false: time is something yeast does not need. (a) False (b) True
15. 15.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
16. 16.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
17. 17.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
18. 18.⚖️ 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) True (b) False
19. 19.True or false: a magnet is something yeast needs. (a) False (b) True
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
21. 21.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to colour it (d) to make it sweet
22. 22.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) sugar (c) a small bottle (d) dry yeast
23. 23.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) put it in your mouth (d) keep it for a month
24. 24.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) sunlight
25. 25.🔍 Which is the odd one out? (a) salt (b) sugar (c) sunlight (d) a magnet
26. 26.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
27. 27.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) time (d) salt
28. 28.🍞 Does yeast need warm water 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 yeast is kept the same. (a) False (b) True
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) turmeric powder (d) a balloon
31. 31.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
32. 32.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a balloon (d) a mirror
33. 33.⚖️ 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 water temperature (b) the amount of sugar (c) the amount of water (d) size of the balloon
34. 34.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.True or false: sugar is something yeast does not need. (a) False (b) True
36. 36.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
37. 37.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
38. 38.🔮 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
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) sugar (c) warm water (d) a balloon
40. 40.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it

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