Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 422 · 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.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) warm water (c) dry yeast (d) a balloon
5. 5.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
6. 6.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
7. 7.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
8. 8.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a tiny living fungus (d) a kind of sugar
9. 9.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
10. 10.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
11. 11.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.⚖️ 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 measure it (c) we keep it the same
13. 13.⚖️ 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
14. 14.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) it shrinks to nothing (d) the balloon is smaller
15. 15.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a mirror (d) a balloon
17. 17.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) time (d) warm water
18. 18.⚖️ 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
19. 19.True or false: salt is something yeast does not need. (a) False (b) True
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) dry yeast (d) sugar
21. 21.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a battery cell (c) a magnet (d) a paper clip
22. 22.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) sunlight
23. 23.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) a magnet
24. 24.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the amount of yeast (d) the amount of water
26. 26.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a balloon (d) turmeric powder
28. 28.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
29. 29.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
30. 30.⚖️ 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 measure it (b) we change it (c) we keep it the same
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a magnet (c) a paper clip (d) a mirror
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of yeast (c) size of the balloon
34. 34.⚖️ 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
35. 35.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
36. 36.⚖️ 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
37. 37.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) salt (d) sugar
38. 38.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) vinegar
39. 39.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
40. 40.True or false: a magnet is something yeast needs. (a) False (b) True

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