Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 206 · 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) dry yeast (b) turmeric powder (c) a mirror (d) a magnet
2. 2.⚖️ 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
3. 3.True or false: warm water is needed for the yeast balloon. (a) True (b) False
4. 4.True or false: salt is something yeast does not need. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) sunlight (b) salt (c) warm water (d) vinegar
6. 6.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) salt (d) time
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a paper clip (d) a small bottle
9. 9.⚖️ 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 water temperature (b) the amount of yeast (c) the same bottles (d) size of the balloon
10. 10.🔍 Which is the odd one out? (a) time (b) salt (c) warm water (d) sugar
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a mirror (c) a battery cell (d) a paper clip
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) True (b) False
14. 14.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) a magnet
15. 15.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
16. 16.⚖️ 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
17. 17.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
18. 18.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) salt (d) sunlight
19. 19.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) sugar (d) a paper clip
21. 21.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a balloon (c) a small bottle (d) warm water
23. 23.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) put it in your mouth (d) throw it at a wall
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) a comb (d) dry yeast
25. 25.True or false: warm water is something yeast does not need. (a) True (b) False
26. 26.⚖️ 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
27. 27.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
28. 28.⚖️ 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 sugar
29. 29.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
30. 30.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of salt (d) a kind of sugar
31. 31.True or false: time is something yeast needs. (a) True (b) False
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it turns yellow (d) it grows much faster
35. 35.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold kills sugar (d) cold slows yeast down
36. 36.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) salt (d) warm water
37. 37.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
38. 38.🍞 Which of these is something yeast needs? (a) time (b) vinegar (c) sunlight (d) salt
39. 39.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a balloon (d) turmeric powder

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