Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 795 · 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 not needed for the yeast balloon? (a) a balloon (b) warm water (c) sugar (d) a battery cell
2. 2.⚖️ 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 yeast
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a small bottle (c) dry yeast (d) sugar
4. 4.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
5. 5.🔮 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
6. 6.⚖️ 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 measure it (c) we change it
7. 7.⚖️ 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 same bottles (b) size of the balloon (c) the water temperature (d) the amount of water
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) warm water (d) a comb
10. 10.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) sugar (d) vinegar
11. 11.🔍 Which is the odd one out? (a) sugar (b) salt (c) warm water (d) time
12. 12.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.⚖️ 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
15. 15.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) warm water (d) sugar
16. 16.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
17. 17.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) sugar (d) a magnet
19. 19.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a mirror (d) a balloon
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) dry yeast (d) a balloon
22. 22.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) a battery cell (d) dry yeast
24. 24.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time
25. 25.True or false: vinegar is something yeast does not need. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
27. 27.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
29. 29.True or false: a magnet is something yeast does not need. (a) True (b) False
30. 30.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
31. 31.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) a magnet (d) sunlight
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) a magnet (d) a mirror
33. 33.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) turmeric powder (d) sugar
35. 35.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) steam (d) smoke
36. 36.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to wash dishes (d) to clean floors
37. 37.⚖️ 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
38. 38.⚖️ 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
39. 39.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
40. 40.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow

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