Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 377 · 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 needed for the yeast balloon? (a) a magnet (b) a mirror (c) a small bottle (d) turmeric powder
2. 2.True or false: sugar is something yeast needs. (a) True (b) False
3. 3.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
4. 4.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
5. 5.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
6. 6.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.🔍 Which is the odd one out? (a) time (b) warm water (c) salt (d) sugar
8. 8.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) sugar (d) warm water
9. 9.🔍 Which is the odd one out? (a) salt (b) sunlight (c) sugar (d) vinegar
10. 10.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
11. 11.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) time (d) sugar
12. 12.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
13. 13.True or false: warm water is needed for the yeast balloon. (a) True (b) False
14. 14.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) a small bottle (d) a mirror
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) warm water (d) a small bottle
17. 17.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
19. 19.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold slows yeast down (d) cold makes it pink
20. 20.⚖️ 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 water temperature (c) the same bottles (d) the amount of sugar
21. 21.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
22. 22.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) warm water (d) a balloon
24. 24.⚖️ 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
25. 25.⚖️ 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 change it (b) we measure it (c) we keep it the same
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a mirror (c) warm water (d) a small bottle
27. 27.⚖️ 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 change it (b) we keep it the same (c) we measure it
28. 28.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
29. 29.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) salt (d) sunlight
30. 30.⚖️ 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
31. 31.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
32. 32.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.⚖️ 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 keep it the same (b) we measure it (c) we change it
34. 34.⚖️ 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
35. 35.True or false: warm water is something yeast needs. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) time (b) sugar (c) vinegar (d) warm water
37. 37.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) warm water (d) sugar
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
39. 39.True or false: salt is something yeast does not need. (a) True (b) False
40. 40.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True

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