Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 523 · 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.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
2. 2.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
3. 3.🔍 Which is the odd one out? (a) salt (b) vinegar (c) a magnet (d) time
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
6. 6.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
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 amount of yeast (d) the same bottles
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
9. 9.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) turmeric powder (d) sugar
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a paper clip (d) warm water
12. 12.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of salt (d) a kind of sugar
13. 13.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
14. 14.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) a magnet (d) a small bottle
16. 16.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) sugar (c) a magnet (d) a mirror
18. 18.⚖️ 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 change it (b) we keep it the same (c) we measure it
19. 19.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
20. 20.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
21. 21.⚖️ 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
22. 22.⚖️ 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) True (b) False
23. 23.⚖️ 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 measure it (c) we change it
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) sugar (d) a comb
25. 25.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) carbon dioxide gas (d) smoke
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a battery cell (c) a small bottle (d) a magnet
28. 28.⚖️ 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 same bottles (b) the amount of yeast (c) the water temperature (d) size of the balloon
29. 29.True or false: warm water is needed for the yeast balloon. (a) False (b) True
30. 30.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
31. 31.True or false: time is something yeast does not need. (a) False (b) True
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a battery cell (c) a small bottle (d) sugar
33. 33.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) a magnet (d) sugar
35. 35.⚖️ 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 change it (c) we keep it the same
36. 36.🍞 Which of these is something yeast needs? (a) warm water (b) vinegar (c) salt (d) a magnet
37. 37.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) sunlight
38. 38.⚖️ 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
39. 39.🍞 Which of these is something yeast needs? (a) salt (b) time (c) sunlight (d) vinegar
40. 40.🔍 Which is the odd one out? (a) sugar (b) warm water (c) a magnet (d) time

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