Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 845 · 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 small bottle (c) turmeric powder (d) a battery cell
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a battery cell (d) warm water
3. 3.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is bigger (d) the balloon is smaller
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) a small bottle (d) a balloon
5. 5.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
7. 7.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) time (b) sugar (c) sunlight (d) warm water
9. 9.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of salt (d) a kind of sugar
10. 10.⚖️ 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 keep it the same (b) we change it (c) we measure it
11. 11.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
12. 12.⚖️ 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 measure it (b) we change it (c) we keep it the same
13. 13.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a comb (d) a small bottle
15. 15.⚖️ 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
16. 16.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
17. 17.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) salt (d) warm water
18. 18.⚖️ 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 measure it (b) we keep it the same (c) we change it
19. 19.⚖️ 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 sugar (b) the same bottles (c) size of the balloon (d) the water temperature
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) False (b) True
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) a paper clip
22. 22.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
23. 23.🍞 Which of these is something yeast needs? (a) time (b) salt (c) a magnet (d) sunlight
24. 24.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
25. 25.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
26. 26.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
27. 27.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
28. 28.⚖️ 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) size of the balloon (c) the water temperature (d) the same bottles
29. 29.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) sugar
30. 30.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) time (d) sugar
31. 31.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) vinegar
32. 32.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
33. 33.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
34. 34.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) air from outside (c) steam (d) smoke
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 “the same bottles”? (a) we keep it the same (b) we change it (c) we measure it
37. 37.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
38. 38.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False

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