Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 542 · 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.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold slows yeast down (d) cold makes it pink
2. 2.⚖️ 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
3. 3.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.⚖️ 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 keep it the same (c) we change it
5. 5.🔮 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
6. 6.⚖️ 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) the water temperature (c) the amount of water (d) size of the balloon
7. 7.⚖️ 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
8. 8.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
9. 9.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a small bottle (d) a paper clip
11. 11.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
12. 12.🔍 Which is the odd one out? (a) salt (b) time (c) warm water (d) sugar
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) sugar (d) dry yeast
14. 14.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
15. 15.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
16. 16.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) a magnet (d) sunlight
17. 17.⚖️ 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 sugar (b) size of the balloon (c) the same bottles (d) the water temperature
18. 18.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
19. 19.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
20. 20.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
21. 21.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
22. 22.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
23. 23.⚖️ 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) the amount of water (c) size of the balloon
24. 24.⚖️ 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 measure it (b) we change it (c) we keep it the same
25. 25.True or false: vinegar is something yeast does not need. (a) True (b) False
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) a small bottle (d) dry yeast
27. 27.True or false: sugar is something yeast needs. (a) True (b) False
28. 28.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) dry yeast (d) a balloon
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a magnet (c) a small bottle (d) sugar
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a balloon (d) a mirror
32. 32.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) sugar (d) time
33. 33.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) salt (d) a magnet
34. 34.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sunlight (d) time
35. 35.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
36. 36.🔍 Which is the odd one out? (a) warm water (b) sugar (c) sunlight (d) time
37. 37.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
38. 38.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) warm water (d) sugar
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) sugar (d) warm water

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