Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 464 · 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.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a mirror (d) sugar
4. 4.⚖️ 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
5. 5.True or false: warm water is something yeast needs. (a) False (b) True
6. 6.⚖️ 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
7. 7.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
8. 8.⚖️ 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 measure it (b) we keep it the same (c) we change it
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) turmeric powder (d) sugar
10. 10.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it shrinks to nothing (d) it turns to bread
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) warm water (d) a battery cell
12. 12.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) warm water (d) a comb
13. 13.True or false: sugar is something yeast does not need. (a) True (b) False
14. 14.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
15. 15.⚖️ 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
16. 16.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a comb (c) a battery cell (d) a small bottle
17. 17.🔍 Which is the odd one out? (a) sugar (b) warm water (c) vinegar (d) time
18. 18.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) put it in your mouth (d) keep it for a month
19. 19.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
20. 20.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) time (d) a magnet
21. 21.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
22. 22.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
23. 23.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of stone (d) a kind of salt
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) warm water (d) a paper clip
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) warm water (c) sugar (d) dry yeast
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a comb (c) dry yeast (d) sugar
27. 27.⚖️ 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 sugar (b) the water temperature (c) the amount of water (d) the amount of yeast
28. 28.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a mirror (c) a battery cell (d) a magnet
29. 29.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) a magnet
30. 30.True or false: warm water is something yeast does not need. (a) True (b) False
31. 31.⚖️ 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
32. 32.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) sunlight
33. 33.True or false: sugar is something yeast needs. (a) True (b) False
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
37. 37.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
38. 38.🔍 Which is the odd one out? (a) warm water (b) sugar (c) salt (d) time
39. 39.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
40. 40.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) warm water (d) vinegar

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