Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 110 · 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 is the odd one out? (a) time (b) a magnet (c) vinegar (d) sunlight
2. 2.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
3. 3.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a small bottle (d) a mirror
4. 4.🔍 Which is the odd one out? (a) a magnet (b) time (c) sugar (d) warm water
5. 5.True or false: vinegar is something yeast needs. (a) True (b) False
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 change it (b) we keep it the same (c) we measure it
7. 7.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) throw it at a wall (d) put it in your mouth
8. 8.True or false: warm water is something yeast does not need. (a) True (b) False
9. 9.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
10. 10.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
12. 12.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
13. 13.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it grows very little (d) it turns yellow
14. 14.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
15. 15.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) vinegar
16. 16.⚖️ 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) the amount of yeast (c) size of the balloon (d) the water temperature
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) a mirror (d) sugar
18. 18.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
19. 19.⚖️ 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
20. 20.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a comb (c) a small bottle (d) dry yeast
22. 22.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) sunlight
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) dry yeast (c) a battery cell (d) a paper clip
24. 24.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
25. 25.🍞 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
26. 26.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
27. 27.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
28. 28.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
30. 30.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone
31. 31.True or false: time is something yeast does not need. (a) False (b) True
32. 32.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) air from outside (d) carbon dioxide gas
33. 33.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it grows faster (d) it turns to sugar
34. 34.True or false: vinegar is something yeast does not need. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) warm water (d) salt
36. 36.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
37. 37.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) a magnet (d) sugar
38. 38.⚖️ 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
39. 39.True or false: warm water is needed for the yeast balloon. (a) True (b) False
40. 40.🍞 Which of these is something yeast does not need? (a) salt (b) sugar (c) time (d) warm water

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