Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 143 · 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 “size of the balloon”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) sunlight
4. 4.⚖️ 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 water (c) the amount of yeast (d) the water temperature
5. 5.⚖️ 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
6. 6.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) salt (d) sunlight
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a paper clip (d) a small bottle
8. 8.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
9. 9.⚖️ 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) True (b) False
10. 10.True or false: sugar is something yeast needs. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sugar (d) time
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a magnet (d) sugar
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) warm water (d) a mirror
14. 14.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) warm water (d) dry yeast
15. 15.⚖️ 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 keep it the same (b) we measure it (c) we change it
16. 16.⚖️ 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) the amount of water (c) size of the balloon
17. 17.⚖️ 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
18. 18.🛟 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
19. 19.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) sugar (c) a paper clip (d) a comb
20. 20.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once
22. 22.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) sunlight (d) warm water
23. 23.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) a magnet
24. 24.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) vinegar
25. 25.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) sugar (d) warm water
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 water (b) the water temperature (c) the amount of sugar (d) the amount of yeast
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) a comb (d) dry yeast
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a balloon (d) a battery cell
30. 30.⚖️ 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
31. 31.True or false: sugar is needed for the yeast balloon. (a) True (b) False
32. 32.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
33. 33.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
35. 35.True or false: salt is something yeast does not need. (a) False (b) True
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) warm water (d) a magnet
37. 37.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) time (d) sugar
38. 38.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a comb (c) turmeric powder (d) a battery cell
39. 39.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False

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