Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 276 · 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 a magnet to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.True or false: sugar is something yeast needs. (a) False (b) True
3. 3.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
4. 4.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of sugar (c) the amount of water (d) the water temperature
6. 6.True or false: time is something yeast does not need. (a) True (b) False
7. 7.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a kind of sugar (d) a tiny living fungus
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) dry yeast (d) a mirror
9. 9.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
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.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it turns yellow (d) it grows much faster
12. 12.⚖️ 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 keep it the same (b) we measure it (c) we change it
13. 13.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) air from outside (d) smoke
14. 14.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a balloon (c) a comb (d) a magnet
16. 16.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) salt (d) time
17. 17.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
18. 18.True or false: warm water is something yeast does not need. (a) False (b) True
19. 19.⚖️ 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
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: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) it turns to bread (d) the balloon is bigger
22. 22.⚖️ 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 yeast (b) size of the balloon (c) the water temperature
23. 23.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
24. 24.⚖️ 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 water (b) the same bottles (c) size of the balloon (d) the water temperature
25. 25.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a battery cell (d) a small bottle
29. 29.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sunlight (d) warm water
30. 30.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.True or false: time is something yeast needs. (a) True (b) False
32. 32.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) sugar (c) a comb (d) a paper clip
33. 33.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
34. 34.⚖️ 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
35. 35.True or false: sunlight is something yeast does not need. (a) False (b) True
36. 36.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
37. 37.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a mirror (d) dry yeast
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) warm water (d) turmeric powder
40. 40.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) warm water (d) sugar

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