Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 241 · 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 is the odd one out? (a) salt (b) a magnet (c) sugar (d) vinegar
2. 2.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
3. 3.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a paper clip (d) sugar
4. 4.🔍 Which is the odd one out? (a) warm water (b) salt (c) sugar (d) time
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) sugar (d) a balloon
6. 6.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.True or false: sugar is needed for the yeast balloon. (a) False (b) True
8. 8.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
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 amount of sugar (b) the water temperature (c) size of the balloon (d) the amount of water
11. 11.True or false: warm water is something yeast needs. (a) True (b) False
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a comb (c) dry yeast (d) a small bottle
13. 13.⚖️ 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 measure it (b) we keep it the same (c) we change it
14. 14.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
15. 15.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a comb (c) sugar (d) warm water
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) turmeric powder (d) dry yeast
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a magnet (d) warm water
19. 19.🔍 Which is the odd one out? (a) vinegar (b) salt (c) sunlight (d) time
20. 20.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) time (d) sugar
21. 21.⚖️ 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
22. 22.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
23. 23.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
24. 24.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) the balloon is bigger (d) it shrinks to nothing
25. 25.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
26. 26.True or false: salt is something yeast needs. (a) True (b) False
27. 27.🛟 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
28. 28.🍞 Which of these is something yeast does not need? (a) sugar (b) a magnet (c) warm water (d) time
29. 29.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to clean floors (d) to colour rice
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) warm water (d) a magnet
31. 31.⚖️ 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) False (b) True
32. 32.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
33. 33.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.⚖️ 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) False (b) True
35. 35.⚖️ 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 keep it the same (b) we measure it (c) we change it
36. 36.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
37. 37.⚖️ 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
38. 38.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
39. 39.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.⚖️ 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 sugar (b) the amount of water (c) size of the balloon (d) the water temperature

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