Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 793 · 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: warm water is something yeast does not need. (a) True (b) False
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.True or false: a comb is needed for the yeast balloon. (a) True (b) False
4. 4.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a comb (d) warm water
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) turmeric powder (d) a comb
7. 7.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
8. 8.⚖️ 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 yeast (b) size of the balloon (c) the water temperature (d) the amount of water
9. 9.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
10. 10.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
11. 11.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.⚖️ 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 keep it the same (b) we measure it (c) we change it
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) put it in your mouth (d) keep it for a month
14. 14.True or false: warm water is needed for the yeast balloon. (a) True (b) False
15. 15.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) the balloon is bigger (d) it turns to bread
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a balloon (d) a battery cell
17. 17.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
20. 20.🍞 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
21. 21.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sunlight (d) warm water
23. 23.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) vinegar (d) warm water
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a mirror (d) a small bottle
25. 25.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
26. 26.🔮 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
27. 27.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
28. 28.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) time (d) sugar
29. 29.⚖️ 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) size of the balloon (c) the water temperature (d) the amount of sugar
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a magnet (d) warm water
31. 31.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
32. 32.⚖️ 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
33. 33.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
35. 35.⚖️ 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 same bottles
36. 36.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
37. 37.True or false: salt is something yeast does not need. (a) True (b) False
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a magnet (d) a balloon

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