Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 72 · 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 balloon is not needed for the yeast balloon. (a) True (b) False
2. 2.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
3. 3.⚖️ 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
4. 4.⚖️ 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) False (b) True
5. 5.True or false: vinegar is something yeast needs. (a) False (b) True
6. 6.True or false: sunlight is something yeast does not need. (a) False (b) True
7. 7.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
8. 8.⚖️ 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
9. 9.⚖️ 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 keep it the same (c) we measure it
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a magnet (c) warm water (d) dry yeast
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a magnet (c) dry yeast (d) a balloon
12. 12.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) sunlight (d) salt
13. 13.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) turmeric powder (c) dry yeast (d) a balloon
15. 15.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) carbon dioxide gas (d) steam
16. 16.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) a magnet (d) warm water
18. 18.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
19. 19.⚖️ 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
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a balloon (d) a comb
21. 21.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
22. 22.True or false: warm water is needed for the yeast balloon. (a) False (b) True
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a small bottle (d) a mirror
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) a small bottle (d) sugar
25. 25.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) a paper clip (d) a comb
26. 26.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) sugar (d) a magnet
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
28. 28.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
29. 29.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
30. 30.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) salt
31. 31.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) a magnet (d) turmeric powder
33. 33.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) warm water (d) salt
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) sugar (c) dry yeast (d) warm water
35. 35.⚖️ 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 amount of water (c) size of the balloon (d) the water temperature
36. 36.⚖️ 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) True (b) False
37. 37.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) ice cold (d) very salty
38. 38.⚖️ 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
39. 39.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) warm water (d) time
40. 40.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) the balloon is smaller (d) it turns to bread

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