Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 636 · 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.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) carbon dioxide gas (d) steam
2. 2.🔍 Which is the odd one out? (a) salt (b) sunlight (c) a magnet (d) sugar
3. 3.🔍 Which is the odd one out? (a) salt (b) sugar (c) warm water (d) time
4. 4.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a paper clip (c) dry yeast (d) a magnet
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) turmeric powder (d) warm water
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) warm water (d) a comb
7. 7.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) very salty (d) boiling hot
8. 8.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
9. 9.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
10. 10.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) vinegar (d) salt
11. 11.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
12. 12.⚖️ 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
13. 13.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it shrinks to nothing (d) it turns to bread
14. 14.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
15. 15.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) sunlight (d) vinegar
16. 16.⚖️ 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 water (b) the water temperature (c) the amount of sugar (d) size of the balloon
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) the same bottles (b) the amount of water (c) the water temperature (d) size of the balloon
18. 18.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) vinegar (d) sugar
19. 19.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) turmeric powder (c) a magnet (d) a balloon
21. 21.True or false: a small bottle is needed for the yeast balloon. (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 same bottles is kept the same. (a) True (b) False
23. 23.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.⚖️ 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 measure it (b) we change it (c) we keep it the same
25. 25.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) time (d) sugar
26. 26.⚖️ 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
27. 27.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it glows (d) it grows faster
28. 28.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
29. 29.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
30. 30.True or false: sunlight is something yeast needs. (a) True (b) False
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.⚖️ 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) True (b) False
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) a balloon (d) a small bottle
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a battery cell (d) sugar
35. 35.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a battery cell (c) warm water (d) a comb
36. 36.⚖️ 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 keep it the same (b) we measure it (c) we change it
37. 37.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a balloon (d) a magnet
40. 40.⚖️ 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

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