Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 803 · 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 not needed for the yeast balloon. (a) True (b) False
2. 2.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to colour rice (d) to wash dishes
3. 3.⚖️ 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 keep it the same (b) we change it (c) we measure it
4. 4.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
5. 5.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) a magnet (d) sugar
6. 6.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a mirror (d) sugar
8. 8.True or false: salt is something yeast does not need. (a) True (b) False
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a balloon (d) a comb
10. 10.True or false: warm water is something yeast does not need. (a) True (b) False
11. 11.True or false: vinegar is something yeast needs. (a) False (b) True
12. 12.True or false: sunlight is something yeast needs. (a) True (b) False
13. 13.⚖️ 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 keep it the same (b) we change it (c) we measure it
14. 14.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) warm water (d) a mirror
15. 15.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
16. 16.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
17. 17.🔍 Which is the odd one out? (a) vinegar (b) time (c) sugar (d) warm water
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) dry yeast (d) a battery cell
19. 19.⚖️ 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) False (b) True
20. 20.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a magnet (d) a small bottle
22. 22.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
23. 23.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a small bottle (d) a magnet
25. 25.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
26. 26.⚖️ 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
27. 27.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
28. 28.🔮 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
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a small bottle (d) turmeric powder
30. 30.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
31. 31.⚖️ 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) size of the balloon (c) the water temperature (d) the same bottles
32. 32.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
33. 33.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
34. 34.True or false: warm water is needed for the yeast balloon. (a) False (b) True
35. 35.⚖️ 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) False (b) True
36. 36.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it grows very little (d) it bursts at once
37. 37.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
39. 39.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
40. 40.True or false: a comb is not needed for the yeast balloon. (a) True (b) False

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