Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 785 · 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 is the odd one out? (a) sunlight (b) vinegar (c) a magnet (d) time
2. 2.⚖️ 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) True (b) False
3. 3.True or false: sunlight is something yeast needs. (a) False (b) True
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 water”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.⚖️ 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) size of the balloon (b) the amount of yeast (c) the water temperature (d) the amount of sugar
6. 6.🔍 Which is the odd one out? (a) time (b) salt (c) sugar (d) warm water
7. 7.⚖️ 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 keep it the same (b) we measure it (c) we change it
8. 8.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) a small bottle (d) dry yeast
10. 10.⚖️ 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 water temperature (d) the amount of water
11. 11.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
12. 12.🍞 Which of these is something yeast does not need? (a) salt (b) sugar (c) time (d) warm water
13. 13.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to clean floors (d) to colour rice
14. 14.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) sugar (d) a comb
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
16. 16.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
17. 17.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) warm water (d) a battery cell
19. 19.🔍 Which is the odd one out? (a) time (b) sugar (c) a magnet (d) warm water
20. 20.True or false: vinegar is something yeast does not need. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) warm water (d) salt
22. 22.True or false: sugar is something yeast needs. (a) True (b) False
23. 23.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
24. 24.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) warm water (d) a mirror
26. 26.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold makes it pink (d) cold water is heavy
27. 27.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) steam (d) carbon dioxide gas
28. 28.True or false: salt is something yeast needs. (a) False (b) True
29. 29.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) a magnet (b) salt (c) sugar (d) sunlight
31. 31.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) sugar (d) warm water
32. 32.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) sugar (d) a battery cell
33. 33.⚖️ 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
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) a magnet (d) sugar
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) dry yeast (c) warm water (d) a balloon
37. 37.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) vinegar (d) warm water
39. 39.⚖️ 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
40. 40.True or false: salt is something yeast does not need. (a) True (b) False

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