Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 374 · 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.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
2. 2.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a mirror (c) a magnet (d) a battery cell
3. 3.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
4. 4.⚖️ 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 yeast (b) the amount of sugar (c) the water temperature (d) size of the balloon
5. 5.⚖️ 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
6. 6.True or false: time is something yeast does not need. (a) False (b) True
7. 7.True or false: warm water is something yeast needs. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) salt
9. 9.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) warm water (d) sugar
10. 10.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
11. 11.⚖️ 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 change it (b) we keep it the same (c) we measure it
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 yeast”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a balloon (d) a battery cell
14. 14.⚖️ 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 yeast (b) the same bottles (c) the amount of sugar (d) size of the balloon
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a small bottle (d) turmeric powder
16. 16.⚖️ 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 keep it the same (c) we measure it
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a paper clip (d) a balloon
18. 18.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) warm water (d) a magnet
19. 19.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) turmeric powder (d) a magnet
21. 21.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) warm water (d) time
22. 22.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.True or false: sugar is something yeast needs. (a) True (b) False
24. 24.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone
25. 25.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a magnet (c) a small bottle (d) a balloon
27. 27.🛟 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
28. 28.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a small bottle (d) a paper clip
30. 30.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) time (d) sugar
32. 32.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of yeast
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a balloon (c) a battery cell (d) a magnet
36. 36.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) warm water (d) time
38. 38.⚖️ 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 keep it the same (c) we change it
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) sugar (d) a comb
40. 40.⚖️ 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

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