Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 847 · 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.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a kind of stone (d) a tiny living fungus
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) warm water (d) dry yeast
3. 3.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
4. 4.True or false: sugar is needed for the yeast balloon. (a) False (b) True
5. 5.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of yeast (c) the water temperature (d) size of the balloon
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a magnet (c) a paper clip (d) a battery cell
8. 8.🔍 Which is the odd one out? (a) time (b) warm water (c) sunlight (d) sugar
9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) throw it at a wall (d) put it in your mouth
10. 10.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a battery cell (c) a paper clip (d) a mirror
11. 11.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
12. 12.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) vinegar (d) sugar
13. 13.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.⚖️ 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
15. 15.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold slows yeast down (d) cold kills sugar
16. 16.True or false: warm water is something yeast needs. (a) False (b) True
17. 17.🔮 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
18. 18.🔍 Which is the odd one out? (a) salt (b) warm water (c) time (d) sugar
19. 19.⚖️ 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 sugar (c) the amount of yeast (d) size of the balloon
20. 20.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
21. 21.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) sunlight (d) salt
22. 22.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) a magnet
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) a balloon (d) warm water
24. 24.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) a mirror (d) a comb
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a small bottle (d) a paper clip
26. 26.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
27. 27.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
28. 28.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
29. 29.⚖️ 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) False (b) True
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a battery cell (d) a balloon
31. 31.⚖️ 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 change it (c) we keep it the same
32. 32.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a magnet (d) a small bottle
34. 34.🔍 Which is the odd one out? (a) time (b) a magnet (c) salt (d) sunlight
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 water temperature (b) the amount of water (c) size of the balloon
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a paper clip (c) a mirror (d) a magnet
37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
38. 38.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
39. 39.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
40. 40.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it

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