Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 470 · 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) warm water (b) time (c) vinegar (d) sugar
2. 2.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of sugar (d) a kind of salt
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a small bottle (d) a paper clip
4. 4.⚖️ 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) False (b) True
5. 5.🔍 Which is the odd one out? (a) warm water (b) salt (c) time (d) sugar
6. 6.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
8. 8.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
9. 9.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) salt
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a comb (c) dry yeast (d) warm water
12. 12.🍞 Which of these is something yeast needs? (a) time (b) sunlight (c) salt (d) a magnet
13. 13.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
14. 14.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to clean floors (d) to make bread rise
15. 15.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
16. 16.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it turns yellow (d) it grows much faster
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a battery cell (c) dry yeast (d) warm water
19. 19.True or false: time is something yeast needs. (a) False (b) True
20. 20.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
21. 21.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a battery cell (c) warm water (d) dry yeast
23. 23.⚖️ 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) True (b) False
24. 24.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
25. 25.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
26. 26.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to colour it (c) to make it sweet (d) to make it heavy
27. 27.⚖️ 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 change it (c) we keep it the same
28. 28.🔍 Which is the odd one out? (a) a magnet (b) salt (c) time (d) sunlight
29. 29.⚖️ 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 yeast (b) size of the balloon (c) the same bottles (d) the amount of water
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
31. 31.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it glows (d) it grows faster
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a balloon (d) a comb
33. 33.True or false: sugar is something yeast does not need. (a) False (b) True
34. 34.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
35. 35.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
37. 37.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is bigger (d) the balloon is smaller
38. 38.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold slows yeast down (c) cold water is heavy (d) cold makes it pink
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a mirror (d) dry yeast
40. 40.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False

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