Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 892 · 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 something yeast needs? (a) time (b) vinegar (c) salt (d) a magnet
2. 2.⚖️ 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
3. 3.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
4. 4.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
5. 5.⚖️ 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
6. 6.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
7. 7.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
8. 8.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
9. 9.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a paper clip (d) a balloon
11. 11.⚖️ 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 keep it the same (b) we measure it (c) we change it
12. 12.True or false: time is something yeast does not need. (a) False (b) True
13. 13.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
14. 14.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) vinegar
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
18. 18.True or false: a magnet is something yeast needs. (a) True (b) False
19. 19.🍞 Which of these is something yeast needs? (a) sugar (b) salt (c) sunlight (d) vinegar
20. 20.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
21. 21.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a balloon (d) a magnet
24. 24.⚖️ 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 water (b) size of the balloon (c) the amount of sugar (d) the amount of yeast
25. 25.⚖️ 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
26. 26.⚖️ 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) True (b) False
27. 27.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) air from outside (d) carbon dioxide gas
28. 28.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) a mirror (d) a magnet
30. 30.⚖️ 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 sugar (c) the water temperature (d) the amount of yeast
31. 31.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) salt (d) warm water
32. 32.⚖️ 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) False (b) True
33. 33.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it turns to sugar (d) it glows
35. 35.🔍 Which is the odd one out? (a) salt (b) sugar (c) warm water (d) time
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) sugar (d) a magnet
37. 37.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a battery cell (d) dry yeast
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) warm water (d) dry yeast
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) sugar (d) warm water
40. 40.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids