Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 574 · 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 something yeast does not need? (a) warm water (b) time (c) salt (d) sugar
2. 2.True or false: sunlight is something yeast does not need. (a) False (b) True
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of yeast (c) size of the balloon (d) the amount of sugar
4. 4.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
5. 5.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) vinegar (d) warm water
6. 6.⚖️ 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 change it (c) we measure it
7. 7.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) salt (d) vinegar
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a mirror (d) a magnet
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a small bottle (d) sugar
10. 10.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of stone (d) a kind of salt
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) dry yeast (d) a magnet
12. 12.⚖️ 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 measure it (c) we change it
13. 13.🔮 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
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a small bottle (c) warm water (d) sugar
15. 15.🔍 Which is the odd one out? (a) salt (b) a magnet (c) sugar (d) sunlight
16. 16.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to clean floors (d) to make bread rise
17. 17.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) carbon dioxide gas (d) steam
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a paper clip (c) dry yeast (d) sugar
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) pour it down the sink (d) keep it for a month
20. 20.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
21. 21.True or false: salt is something yeast needs. (a) True (b) False
22. 22.⚖️ 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
23. 23.True or false: a magnet is something yeast needs. (a) False (b) True
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) sugar (c) dry yeast (d) warm water
25. 25.True or false: warm water is needed for the yeast balloon. (a) False (b) True
26. 26.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) vinegar (d) salt
27. 27.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
28. 28.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a battery cell (c) turmeric powder (d) a mirror
29. 29.⚖️ 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
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of sugar
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
32. 32.⚖️ 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) size of the balloon (c) the same bottles (d) the amount of sugar
33. 33.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) very salty (d) boiling hot
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of yeast
35. 35.True or false: vinegar is something yeast does not need. (a) False (b) True
36. 36.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
37. 37.⚖️ 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
38. 38.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
39. 39.True or false: sugar is something yeast needs. (a) True (b) False
40. 40.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it

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