Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 242 · 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 does not need? (a) time (b) sugar (c) a magnet (d) warm water
2. 2.⚖️ 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
3. 3.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) it grows faster (d) the yeast is killed
4. 4.⚖️ 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 water (b) size of the balloon (c) the same bottles (d) the water temperature
5. 5.⚖️ 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 measure it (c) we change it
6. 6.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
8. 8.True or false: salt is something yeast needs. (a) True (b) False
9. 9.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
10. 10.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) warm water (c) a small bottle (d) a balloon
12. 12.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🔮 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
14. 14.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
15. 15.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) warm water (d) turmeric powder
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) sugar (d) a magnet
18. 18.⚖️ 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) size of the balloon (b) the amount of yeast (c) the water temperature (d) the amount of water
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a balloon (c) a paper clip (d) a comb
20. 20.True or false: sugar is something yeast does not need. (a) True (b) False
21. 21.⚖️ 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) size of the balloon (c) the amount of water
22. 22.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) vinegar (d) sunlight
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
24. 24.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) salt
25. 25.True or false: a comb is needed for the yeast balloon. (a) False (b) True
26. 26.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) sunlight (b) time (c) warm water (d) sugar
29. 29.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a balloon (c) warm water (d) sugar
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) warm water (d) a paper clip
32. 32.⚖️ 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 keep it the same (c) we measure it
33. 33.🔍 Which is the odd one out? (a) time (b) sugar (c) vinegar (d) warm water
34. 34.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows much faster (d) it grows very little
35. 35.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a paper clip (c) a mirror (d) dry yeast
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
37. 37.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) a paper clip (d) sugar
40. 40.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True

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