Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 912 · 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 of these is something yeast does not need? (a) time (b) warm water (c) a magnet (d) sugar
2. 2.⚖️ 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 sugar (c) the water temperature
3. 3.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
4. 4.⚖️ 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 measure it (c) we change it
5. 5.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) vinegar (d) sunlight
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) warm water (d) a comb
7. 7.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
8. 8.⚖️ 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 measure it (b) we keep it the same (c) we change it
9. 9.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) vinegar
10. 10.🔍 Which is the odd one out? (a) time (b) sugar (c) a magnet (d) warm water
11. 11.True or false: sugar is needed for the yeast balloon. (a) False (b) True
12. 12.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
13. 13.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
14. 14.⚖️ 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 water (b) the same bottles (c) size of the balloon (d) the amount of yeast
15. 15.True or false: salt is something yeast needs. (a) False (b) True
16. 16.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
17. 17.True or false: a magnet is something yeast needs. (a) False (b) True
18. 18.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
19. 19.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) smoke (d) carbon dioxide gas
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) dry yeast (c) warm water (d) a small bottle
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a paper clip (c) warm water (d) dry yeast
22. 22.True or false: sunlight is something yeast does not need. (a) True (b) False
23. 23.⚖️ 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
24. 24.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) it shrinks to nothing (d) the balloon is smaller
25. 25.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
27. 27.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) sugar (d) a battery cell
30. 30.⚖️ 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
31. 31.🔮 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
32. 32.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) salt (d) warm water
33. 33.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
35. 35.⚖️ 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
36. 36.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to clean floors (d) to wash dishes
37. 37.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
38. 38.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
40. 40.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed

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