Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 991 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) warm water (c) a small bottle (d) a balloon
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a magnet (d) sugar
3. 3.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) carbon dioxide gas (d) steam
4. 4.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
5. 5.⚖️ 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 change it (b) we keep it the same (c) we measure it
6. 6.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) dry yeast (d) a battery cell
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) size of the balloon (c) the same bottles (d) the amount of sugar
8. 8.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
9. 9.⚖️ 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 yeast (c) size of the balloon
10. 10.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) sunlight
11. 11.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold slows yeast down (d) cold kills sugar
12. 12.True or false: vinegar is something yeast needs. (a) False (b) True
13. 13.True or false: time is something yeast needs. (a) False (b) True
14. 14.⚖️ 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 measure it (b) we change it (c) we keep it the same
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) a small bottle (d) a comb
16. 16.⚖️ 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
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a small bottle (d) a battery cell
18. 18.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
19. 19.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
20. 20.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
21. 21.⚖️ 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
22. 22.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) a balloon (d) a small bottle
24. 24.⚖️ 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
25. 25.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
26. 26.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) salt
27. 27.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) time (d) sugar
28. 28.True or false: warm water is something yeast does not need. (a) False (b) True
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) False (b) True
30. 30.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
31. 31.🔮 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 bigger (d) the balloon is smaller
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) warm water (d) dry yeast
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 water temperature (c) size of the balloon (d) the amount of sugar
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a small bottle (d) a magnet
37. 37.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
38. 38.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) sugar (d) a magnet
39. 39.True or false: time is something yeast does not need. (a) False (b) True
40. 40.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False

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