Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 963 · 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 comb is needed for the yeast balloon. (a) False (b) True
2. 2.⚖️ 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 sugar (b) the same bottles (c) size of the balloon (d) the amount of water
3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
4. 4.⚖️ 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 change it (c) we measure it
5. 5.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
7. 7.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
8. 8.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
9. 9.🔍 Which is the odd one out? (a) salt (b) time (c) warm water (d) sugar
10. 10.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) a magnet
11. 11.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold water is heavy (d) cold makes it pink
12. 12.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
13. 13.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
14. 14.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) sunlight (d) salt
15. 15.True or false: sunlight is something yeast does not need. (a) False (b) True
16. 16.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
17. 17.⚖️ 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
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
19. 19.⚖️ 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
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a balloon (d) a magnet
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) size of the balloon (c) the water temperature
22. 22.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to colour rice (d) to clean floors
23. 23.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.⚖️ 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 measure it (c) we change it
25. 25.⚖️ 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 keep it the same (c) we measure it
26. 26.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a battery cell (d) warm water
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
29. 29.True or false: vinegar is something yeast does not need. (a) False (b) True
30. 30.True or false: sugar is something yeast needs. (a) True (b) False
31. 31.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a comb (c) a mirror (d) turmeric powder
32. 32.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
33. 33.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) warm water (d) time
34. 34.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
35. 35.⚖️ 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 same bottles (b) the amount of sugar (c) size of the balloon (d) the water temperature
36. 36.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a balloon (d) a comb
38. 38.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) salt (d) sunlight
40. 40.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) warm water (d) sugar

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