Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 184 · 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.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) False (b) True
3. 3.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) vinegar (d) salt
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the water temperature (c) the amount of yeast (d) size of the balloon
6. 6.True or false: sunlight is something yeast does not need. (a) False (b) True
7. 7.True or false: a comb is needed for the yeast balloon. (a) False (b) True
8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
9. 9.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) a paper clip (d) a balloon
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) turmeric powder (c) sugar (d) a balloon
11. 11.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
12. 12.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) sugar (d) dry yeast
14. 14.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
15. 15.⚖️ 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
16. 16.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
17. 17.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
18. 18.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
19. 19.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
20. 20.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
21. 21.⚖️ 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 change it (b) we measure it (c) we keep it the same
22. 22.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
23. 23.⚖️ 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
24. 24.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) sugar (d) vinegar
25. 25.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
26. 26.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) time (d) sugar
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a battery cell (d) a balloon
28. 28.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
29. 29.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a paper clip (d) a small bottle
31. 31.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a mirror (c) a battery cell (d) a magnet
32. 32.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) a magnet
33. 33.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) warm water (d) a magnet
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) turmeric powder (c) a magnet (d) a small bottle
36. 36.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
38. 38.⚖️ 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
39. 39.⚖️ 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
40. 40.⚖️ 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 water temperature (b) the same bottles (c) the amount of water (d) the amount of yeast

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