Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 427 · 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 does not need? (a) sugar (b) sunlight (c) time (d) warm water
2. 2.⚖️ 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
3. 3.True or false: time is something yeast does not need. (a) True (b) False
4. 4.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) vinegar (d) sunlight
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a magnet (d) dry yeast
6. 6.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a battery cell (c) a mirror (d) a magnet
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) warm water (d) a battery cell
9. 9.🔍 Which is the odd one out? (a) salt (b) warm water (c) time (d) sugar
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
11. 11.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it bursts at once (d) it grows very little
12. 12.⚖️ 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 yeast
13. 13.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) vinegar
14. 14.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) a magnet (b) time (c) salt (d) sunlight
16. 16.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) warm water (d) dry yeast
18. 18.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) time (d) sunlight
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
21. 21.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
22. 22.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) sugar (d) warm water
23. 23.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) sugar (d) a magnet
24. 24.⚖️ 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) True (b) False
25. 25.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to colour it (d) to make it sweet
26. 26.True or false: a comb is needed for the yeast balloon. (a) False (b) True
27. 27.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
28. 28.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
29. 29.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold makes it pink (c) cold kills sugar (d) cold water is heavy
30. 30.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
31. 31.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a mirror (c) a battery cell (d) a magnet
32. 32.⚖️ 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 keep it the same (b) we measure it (c) we change it
33. 33.🔮 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 smaller (d) the balloon is bigger
34. 34.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
35. 35.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.🔍 Which is the odd one out? (a) time (b) warm water (c) a magnet (d) sugar
37. 37.🔍 Which is the odd one out? (a) salt (b) sunlight (c) a magnet (d) sugar
38. 38.True or false: vinegar is something yeast needs. (a) False (b) True
39. 39.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a mirror (d) a small bottle

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