Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 286 · 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 change it (b) we measure it (c) we keep it the same
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) sugar (d) a paper clip
3. 3.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of sugar (d) a kind of stone
4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
5. 5.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a mirror (d) sugar
7. 7.⚖️ 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) False (b) True
8. 8.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) sugar (d) a battery cell
10. 10.⚖️ 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 change it (c) we keep it the same
11. 11.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
12. 12.True or false: sugar is needed for the yeast balloon. (a) False (b) True
13. 13.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) carbon dioxide gas (d) steam
14. 14.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) turmeric powder (c) a mirror (d) a comb
15. 15.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
16. 16.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
17. 17.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) sunlight
18. 18.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
19. 19.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a comb (c) a small bottle (d) warm water
23. 23.🍞 Does yeast need sunlight 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? True or false: the water temperature is the one thing we change. (a) False (b) True
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a comb (d) dry yeast
26. 26.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
27. 27.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) sunlight (d) a magnet
28. 28.⚖️ 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
29. 29.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
30. 30.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
31. 31.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
32. 32.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
33. 33.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) vinegar (d) sugar
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a magnet (d) a balloon
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) sugar (d) warm water
36. 36.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
37. 37.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a small bottle (d) a battery cell
39. 39.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) salt (b) sugar (c) sunlight (d) a magnet

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