Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 599 · 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.⚖️ 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
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
4. 4.⚖️ 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 measure it (b) we change it (c) we keep it the same
5. 5.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
6. 6.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) a magnet (d) salt
7. 7.⚖️ 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 water temperature (c) the amount of sugar
8. 8.True or false: a comb is needed for the yeast balloon. (a) False (b) True
9. 9.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) smoke (d) carbon dioxide gas
10. 10.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
11. 11.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a magnet (c) sugar (d) warm water
13. 13.⚖️ 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) the amount of water (d) size of the balloon
14. 14.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
15. 15.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a paper clip (c) a magnet (d) sugar
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a balloon (d) a comb
18. 18.🔍 Which is the odd one out? (a) time (b) a magnet (c) warm water (d) sugar
19. 19.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
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 water (b) the water temperature (c) the amount of sugar (d) the same bottles
21. 21.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of yeast (c) size of the balloon
26. 26.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
27. 27.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) warm water (d) time
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) sugar (c) dry yeast (d) a small bottle
29. 29.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it grows very little (d) it turns yellow
30. 30.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) time (b) vinegar (c) a magnet (d) sunlight
32. 32.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) dry yeast (d) warm water
34. 34.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) very salty (d) boiling hot
35. 35.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) salt (d) sugar
36. 36.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
37. 37.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) dry yeast (d) a mirror
38. 38.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
39. 39.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
40. 40.🍞 Which of these is something yeast needs? (a) time (b) vinegar (c) a magnet (d) salt

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