Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 590 · 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.⚖️ 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 keep it the same (c) we measure it
2. 2.True or false: time is something yeast needs. (a) False (b) True
3. 3.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
4. 4.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sunlight (d) warm water
5. 5.⚖️ 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 amount of sugar
6. 6.⚖️ 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
7. 7.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
8. 8.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to clean floors (d) to wash dishes
9. 9.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold slows yeast down (d) cold water is heavy
10. 10.True or false: time is something yeast does not need. (a) False (b) True
11. 11.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) it turns to sugar (d) the yeast is killed
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
15. 15.⚖️ 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 water (d) the amount of yeast
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) turmeric powder (d) a balloon
19. 19.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) warm water (d) sugar
20. 20.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
21. 21.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
22. 22.🍞 Which of these is something yeast does not need? (a) a magnet (b) sugar (c) warm water (d) time
23. 23.🔍 Which is the odd one out? (a) salt (b) a magnet (c) vinegar (d) warm water
24. 24.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) vinegar (d) salt
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a comb (c) a balloon (d) dry yeast
27. 27.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
28. 28.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) salt (d) time
29. 29.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
30. 30.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
31. 31.True or false: a magnet is something yeast does not need. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) a magnet
33. 33.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) a comb (d) a mirror
34. 34.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
35. 35.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
36. 36.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) smoke (d) carbon dioxide gas
37. 37.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) a mirror (d) a balloon
39. 39.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
40. 40.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) salt (d) time

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