Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 568 · 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? 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
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) dry yeast (d) a mirror
3. 3.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a balloon (d) a small bottle
4. 4.⚖️ 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 measure it (c) we keep it the same
5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) warm water (d) a comb
7. 7.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) sunlight (d) warm water
8. 8.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
9. 9.⚖️ 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) True (b) False
10. 10.⚖️ 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) size of the balloon (c) the water temperature (d) the amount of yeast
11. 11.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
12. 12.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) a magnet (d) time
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) sugar (c) dry yeast (d) a balloon
14. 14.⚖️ 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 measure it (c) we keep it the same
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
16. 16.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
17. 17.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) salt (d) sugar
18. 18.True or false: sugar is something yeast does not need. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) sugar (b) time (c) a magnet (d) warm water
20. 20.🛟 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
21. 21.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
22. 22.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.True or false: sunlight is something yeast does not need. (a) False (b) True
24. 24.⚖️ 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) False (b) True
25. 25.True or false: vinegar is something yeast does not need. (a) True (b) False
26. 26.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) time
28. 28.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) air from outside (d) carbon dioxide gas
29. 29.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) a magnet (d) vinegar
30. 30.🍞 Which of these is something yeast does not need? (a) salt (b) sugar (c) warm water (d) time
31. 31.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
32. 32.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
33. 33.True or false: vinegar is something yeast needs. (a) True (b) False
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a comb (c) sugar (d) warm water
36. 36.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
37. 37.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
38. 38.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) a comb (d) a magnet
40. 40.⚖️ 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

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