Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 211 · 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 blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) smoke (d) carbon dioxide gas
2. 2.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sunlight (d) a magnet
3. 3.⚖️ 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
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of yeast (c) the water temperature (d) the amount of sugar
5. 5.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it turns to sugar (d) it grows faster
6. 6.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) sugar (c) warm water (d) a small bottle
9. 9.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) time (d) warm water
10. 10.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
12. 12.⚖️ 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) True (b) False
13. 13.True or false: a magnet is something yeast does not need. (a) False (b) True
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a small bottle (d) a mirror
16. 16.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
17. 17.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
18. 18.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
19. 19.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.⚖️ 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 water (b) the same bottles (c) size of the balloon (d) the water temperature
21. 21.True or false: warm water is something yeast needs. (a) True (b) False
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) True (b) False
23. 23.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a comb (d) warm water
25. 25.⚖️ 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) True (b) False
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a balloon (d) a magnet
27. 27.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
28. 28.⚖️ 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 keep it the same (b) we change it (c) we measure it
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a battery cell (c) sugar (d) a small bottle
30. 30.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
31. 31.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
32. 32.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
33. 33.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) a magnet (d) salt
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.True or false: a comb is needed for the yeast balloon. (a) True (b) False
36. 36.⚖️ 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 measure it (c) we change it
37. 37.True or false: salt is something yeast needs. (a) True (b) False
38. 38.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
39. 39.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
40. 40.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it

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