Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 114 · 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 magnet is something yeast needs. (a) False (b) True
2. 2.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
4. 4.True or false: sugar is something yeast does not need. (a) True (b) False
5. 5.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a mirror (c) a paper clip (d) a comb
6. 6.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a paper clip (d) sugar
8. 8.⚖️ 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 measure it (b) we change it (c) we keep it the same
9. 9.True or false: vinegar is something yeast needs. (a) True (b) False
10. 10.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
13. 13.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
14. 14.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
15. 15.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
16. 16.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
17. 17.⚖️ 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 measure it (b) we change it (c) we keep it the same
18. 18.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) vinegar (d) sunlight
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) dry yeast (d) sugar
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 yeast (b) the same bottles (c) size of the balloon (d) the water temperature
21. 21.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to clean floors (d) to make bread rise
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) turmeric powder (d) a balloon
23. 23.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
24. 24.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold slows yeast down (d) cold water is heavy
25. 25.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) it turns to sugar (d) the yeast is killed
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a comb (d) sugar
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
28. 28.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
29. 29.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sunlight (d) sugar
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) warm water (d) a comb
31. 31.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
32. 32.⚖️ 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
33. 33.⚖️ 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 measure it (c) we keep it the same
34. 34.True or false: salt is something yeast needs. (a) True (b) False
35. 35.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a battery cell (d) a small bottle
37. 37.🔍 Which is the odd one out? (a) warm water (b) salt (c) sugar (d) time
38. 38.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) sunlight
39. 39.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) salt (d) sugar
40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

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