Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 126 · 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 needs? (a) vinegar (b) salt (c) a magnet (d) time
2. 2.🔍 Which is the odd one out? (a) vinegar (b) time (c) salt (d) a magnet
3. 3.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.🔍 Which is the odd one out? (a) vinegar (b) time (c) sugar (d) warm water
5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
6. 6.⚖️ 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
7. 7.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of stone (d) a kind of sugar
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) dry yeast (d) a mirror
9. 9.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) dry yeast (d) sugar
12. 12.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it turns to sugar (d) it glows
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) sugar (d) a mirror
14. 14.⚖️ 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 keep it the same (c) we measure it
15. 15.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of water (c) size of the balloon (d) the amount of yeast
17. 17.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
18. 18.🔍 Which is the odd one out? (a) time (b) sunlight (c) warm water (d) sugar
19. 19.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
21. 21.True or false: warm water is something yeast does not need. (a) False (b) True
22. 22.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
25. 25.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
26. 26.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
27. 27.⚖️ 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) the water temperature (d) the amount of water
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a paper clip (c) a mirror (d) a small bottle
29. 29.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time
30. 30.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice
31. 31.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a small bottle (d) turmeric powder
33. 33.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
34. 34.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
35. 35.True or false: sunlight is something yeast needs. (a) False (b) True
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) the water temperature (c) size of the balloon
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) sugar (d) a mirror
38. 38.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
39. 39.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) a magnet (d) sunlight
40. 40.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it

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