Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 564 · 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: time is something yeast needs. (a) False (b) True
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the water temperature (c) the amount of sugar (d) the same bottles
3. 3.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) it shrinks to nothing (d) the balloon is smaller
4. 4.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
5. 5.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) time (d) salt
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) pour it down the sink (d) keep it for a month
7. 7.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
8. 8.⚖️ 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 measure it (b) we change it (c) we keep it the same
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) a small bottle (d) dry yeast
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
13. 13.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) vinegar (d) sunlight
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) warm water (d) a comb
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a small bottle (d) a magnet
16. 16.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold kills sugar (d) cold slows yeast down
17. 17.🔍 Which is the odd one out? (a) salt (b) sugar (c) warm water (d) time
18. 18.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of sugar (d) a kind of stone
19. 19.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
20. 20.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) sugar (d) warm water
21. 21.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
22. 22.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) dry yeast (d) turmeric powder
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) vinegar (b) time (c) warm water (d) sugar
25. 25.⚖️ 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) True (b) False
26. 26.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) sunlight
27. 27.True or false: time is something yeast does not need. (a) False (b) True
28. 28.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it grows very little (d) it bursts at once
29. 29.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) sugar (d) warm water
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a magnet (c) dry yeast (d) a mirror
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a paper clip (d) a small bottle
32. 32.🔍 Which is the odd one out? (a) sunlight (b) salt (c) time (d) a magnet
33. 33.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
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? True or false: size of the balloon is the one thing we change. (a) True (b) False
36. 36.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
37. 37.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
38. 38.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a magnet (d) a paper clip
39. 39.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
40. 40.⚖️ 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) True (b) False

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