Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 64 · 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.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
2. 2.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
3. 3.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) warm water (d) dry yeast
5. 5.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) it turns to sugar (d) the yeast is killed
6. 6.⚖️ 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 yeast (b) the water temperature (c) the amount of water (d) the amount of sugar
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) size of the balloon (c) the amount of sugar (d) the amount of yeast
8. 8.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) time (d) salt
9. 9.🔍 Which is the odd one out? (a) salt (b) warm water (c) time (d) sugar
10. 10.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) the balloon is bigger (d) it turns to bread
11. 11.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) sugar (d) a magnet
12. 12.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) vinegar
13. 13.⚖️ 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 keep it the same (c) we measure it
14. 14.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
15. 15.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
16. 16.⚖️ 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
17. 17.⚖️ 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
18. 18.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
19. 19.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
20. 20.True or false: a magnet is something yeast needs. (a) False (b) True
21. 21.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
23. 23.⚖️ 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 change it (b) we measure it (c) we keep it the same
24. 24.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
25. 25.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
26. 26.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sugar (d) salt
27. 27.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) it is food for yeast (c) to make it heavy (d) to colour it
28. 28.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
29. 29.🍞 Which of these is something yeast does not need? (a) salt (b) warm water (c) sugar (d) time
30. 30.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) smoke (d) steam
31. 31.🍞 Which of these is something yeast needs? (a) vinegar (b) warm water (c) a magnet (d) sunlight
32. 32.⚖️ 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
33. 33.True or false: vinegar is something yeast needs. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
35. 35.⚖️ 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 keep it the same (b) we change it (c) we measure it
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the same bottles (c) the water temperature
37. 37.🔍 Which is the odd one out? (a) sugar (b) warm water (c) sunlight (d) time
38. 38.True or false: a magnet is something yeast does not need. (a) False (b) True
39. 39.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
40. 40.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed

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