Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 17 · 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.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a balloon (d) a comb
2. 2.🔍 Which is the odd one out? (a) time (b) sunlight (c) warm water (d) sugar
3. 3.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
4. 4.⚖️ 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 measure it (c) we change it
5. 5.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) dry yeast (c) a mirror (d) a magnet
6. 6.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) warm water (c) a comb (d) a paper clip
8. 8.True or false: warm water is needed for the yeast balloon. (a) True (b) False
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) warm water (c) a small bottle (d) sugar
10. 10.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) air from outside (d) carbon dioxide gas
11. 11.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) dry yeast (c) warm water (d) a balloon
13. 13.True or false: sugar is something yeast needs. (a) False (b) True
14. 14.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold kills sugar (d) cold water is heavy
15. 15.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) salt
16. 16.🍞 Which of these is something yeast needs? (a) time (b) a magnet (c) sunlight (d) salt
17. 17.⚖️ 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 keep it the same (c) we measure it
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of water
19. 19.🔍 Which is the odd one out? (a) salt (b) vinegar (c) warm water (d) a magnet
20. 20.🔮 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
21. 21.⚖️ 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
22. 22.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) dry yeast (c) a balloon (d) warm water
24. 24.⚖️ 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) True (b) False
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a battery cell (d) a balloon
26. 26.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
27. 27.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) sugar (d) time
28. 28.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a magnet (d) a balloon
30. 30.⚖️ 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
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 water”? (a) we keep it the same (b) we measure it (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 amount of sugar is kept the same. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) salt (b) a magnet (c) time (d) sunlight
34. 34.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) a paper clip (d) a magnet
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) turmeric powder (d) sugar
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
37. 37.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
38. 38.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) it shrinks to nothing (d) the balloon is smaller
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) the water temperature (c) size of the balloon
40. 40.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False

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