Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 522 · 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.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
2. 2.True or false: a magnet is something yeast needs. (a) False (b) True
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 yeast”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) turmeric powder (d) a small bottle
6. 6.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) time (d) warm water
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 kept the same. (a) False (b) True
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) sugar (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 kept the same? (a) the water temperature (b) size of the balloon (c) the same bottles
11. 11.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a paper clip (c) a mirror (d) warm water
12. 12.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.⚖️ 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 water temperature (c) the amount of water (d) the amount of sugar
14. 14.🍞 Which of these is something yeast needs? (a) time (b) salt (c) vinegar (d) a magnet
15. 15.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it turns to sugar (d) it grows faster
16. 16.⚖️ 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 sugar (c) size of the balloon
17. 17.⚖️ 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 measure it (c) we keep it the same
18. 18.True or false: sunlight is something yeast does not need. (a) True (b) False
19. 19.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to colour rice (d) to clean floors
20. 20.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
21. 21.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a comb (c) sugar (d) warm water
23. 23.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a battery cell (c) sugar (d) dry yeast
25. 25.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
26. 26.⚖️ 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
27. 27.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of sugar (b) size of the balloon (c) the water temperature (d) the same bottles
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
30. 30.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
31. 31.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to colour it (d) to make it sweet
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a paper clip (c) sugar (d) a mirror
33. 33.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) air from outside (d) carbon dioxide gas
34. 34.⚖️ 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
35. 35.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold makes it pink (d) cold kills sugar
38. 38.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a balloon (d) a paper clip
39. 39.⚖️ 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 yeast (c) size of the balloon
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) False (b) True

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