Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 446 · 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.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) air from outside (c) steam (d) smoke
2. 2.True or false: sunlight is something yeast needs. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) time (b) salt (c) sugar (d) warm water
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of water (b) size of the balloon (c) the water temperature
5. 5.True or false: warm water is something yeast does not need. (a) False (b) True
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a mirror (c) warm water (d) a small bottle
9. 9.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) dry yeast (d) a mirror
10. 10.🔍 Which is the odd one out? (a) time (b) sunlight (c) a magnet (d) salt
11. 11.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
12. 12.⚖️ 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) size of the balloon (c) the amount of yeast
13. 13.True or false: a magnet is something yeast needs. (a) False (b) True
14. 14.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
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 kept the same. (a) True (b) False
16. 16.🛟 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
17. 17.True or false: salt is something yeast needs. (a) True (b) False
18. 18.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
19. 19.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a kind of sugar (d) a tiny living fungus
20. 20.⚖️ 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
21. 21.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.⚖️ 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
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a battery cell (c) a balloon (d) dry yeast
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) sugar (d) a mirror
26. 26.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) sugar (d) time
27. 27.⚖️ 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 water (b) the amount of yeast (c) the water temperature (d) the same bottles
28. 28.True or false: vinegar is something yeast needs. (a) True (b) False
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) warm water (d) a paper clip
30. 30.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) a battery cell (d) turmeric powder
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a small bottle (d) a magnet
32. 32.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
33. 33.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) time (d) warm water
34. 34.True or false: sugar is something yeast needs. (a) True (b) False
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) the water temperature (c) size of the balloon
36. 36.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) salt (d) vinegar
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) the water temperature (c) size of the balloon
39. 39.True or false: sunlight is something yeast does not need. (a) True (b) False
40. 40.⚖️ 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

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