Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 553 · 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 needed for the yeast balloon? (a) a magnet (b) a paper clip (c) a battery cell (d) a balloon
2. 2.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) it turns to bread (d) the balloon is bigger
3. 3.⚖️ 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
4. 4.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
5. 5.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of salt (d) a kind of stone
6. 6.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
7. 7.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) ice cold (d) very salty
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) a mirror (d) turmeric powder
9. 9.True or false: sunlight is something yeast needs. (a) True (b) False
10. 10.⚖️ 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 measure it (b) we keep it the same (c) we change it
11. 11.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a comb (c) dry yeast (d) warm water
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) salt
15. 15.⚖️ 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
16. 16.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
17. 17.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sugar (d) sunlight
18. 18.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
19. 19.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
20. 20.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) warm water (d) a balloon
22. 22.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold makes it pink (d) cold kills sugar
23. 23.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
24. 24.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a small bottle (d) a battery cell
25. 25.⚖️ 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 amount of yeast (c) size of the balloon (d) the water temperature
26. 26.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) air from outside (c) smoke (d) steam
27. 27.⚖️ 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
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
29. 29.True or false: a magnet is something yeast does not need. (a) True (b) False
30. 30.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
31. 31.🍞 Which of these is something yeast does not need? (a) a magnet (b) time (c) warm water (d) sugar
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
33. 33.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
34. 34.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) sunlight (d) a magnet
35. 35.⚖️ 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 water (b) size of the balloon (c) the water temperature
36. 36.⚖️ 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
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a small bottle (c) warm water (d) sugar
38. 38.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) sugar (d) time
39. 39.⚖️ 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
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False

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