Yeast Balloon Experiment Worksheet

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

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