Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 631 · 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) a small bottle (b) dry yeast (c) sugar (d) a comb
2. 2.True or false: time is something yeast does not need. (a) True (b) False
3. 3.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
4. 4.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a kind of salt (d) a tiny living fungus
5. 5.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
6. 6.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a mirror (d) sugar
8. 8.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) time (d) sugar
9. 9.True or false: turmeric powder is 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? True or false: the water temperature is the one thing we change. (a) True (b) False
11. 11.True or false: a magnet is something yeast needs. (a) False (b) True
12. 12.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a magnet (c) a mirror (d) turmeric powder
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) sugar (c) a comb (d) a mirror
14. 14.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a magnet (d) warm water
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) warm water (c) dry yeast (d) a small bottle
17. 17.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) air from outside (d) smoke
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) sugar (c) a balloon (d) a small bottle
19. 19.⚖️ 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 change it (b) we measure it (c) we keep it the same
20. 20.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) sugar (b) time (c) sunlight (d) warm water
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a battery cell (d) dry yeast
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the water temperature (d) the amount of sugar
25. 25.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) a magnet (d) warm water
26. 26.🛟 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
27. 27.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.🔍 Which is the odd one out? (a) salt (b) sugar (c) vinegar (d) sunlight
29. 29.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
30. 30.True or false: a small bottle is not needed for the yeast balloon. (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 “the amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.True or false: salt is something yeast does not need. (a) True (b) False
33. 33.⚖️ 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
34. 34.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
35. 35.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
36. 36.⚖️ 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
37. 37.⚖️ 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 keep it the same (c) we measure it
38. 38.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold slows yeast down (d) cold water is heavy
39. 39.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it grows faster (d) it turns to sugar
40. 40.⚖️ 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

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