Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 226 · 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.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
2. 2.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
5. 5.🔍 Which is the odd one out? (a) vinegar (b) time (c) warm water (d) sugar
6. 6.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to colour rice (c) to wash dishes (d) to make bread rise
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) a balloon (d) dry yeast
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
9. 9.True or false: sugar is something yeast does not need. (a) True (b) False
10. 10.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
12. 12.⚖️ 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 water temperature (b) the amount of yeast (c) the amount of water (d) the amount of sugar
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) a magnet (d) a balloon
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: time is something yeast needs. (a) False (b) True
16. 16.True or false: sugar is something yeast needs. (a) True (b) False
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a balloon (c) sugar (d) a small bottle
18. 18.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
19. 19.🔍 Which is the odd one out? (a) salt (b) vinegar (c) sugar (d) a magnet
20. 20.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
21. 21.⚖️ 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
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a comb (c) a small bottle (d) a balloon
23. 23.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sunlight (d) warm water
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a small bottle (c) sugar (d) a balloon
25. 25.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold makes it pink (c) cold water is heavy (d) cold kills sugar
26. 26.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) warm water (d) a mirror
28. 28.⚖️ 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 change it (c) we measure it
29. 29.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) time (d) sugar
30. 30.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.⚖️ 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 amount of sugar (c) the same bottles (d) the amount of water
32. 32.⚖️ 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 measure it (c) we keep it the same
33. 33.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) sugar (d) turmeric powder
34. 34.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
35. 35.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sugar (d) salt
36. 36.⚖️ 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) False (b) True
37. 37.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
38. 38.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) salt (d) time
39. 39.⚖️ 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
40. 40.🍞 Which of these is something yeast does not need? (a) salt (b) warm water (c) time (d) sugar

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